Search a number
-
+
221212261250 = 2545322512
BaseRepresentation
bin1100111000000101000…
…1110011101110000010
3210010222122220012112222
43032001101303232002
512111020314330000
6245342402251042
721660563124161
oct3160121635602
9703878805488
10221212261250
11858a7611022
1236a57656a82
1317b24bc2156
14a9c73a93d8
155b4a84da85
hex3381473b82

221212261250 has 90 divisors (see below), whose sum is σ = 424301693277. Its totient is φ = 86469500000.

The previous prime is 221212261241. The next prime is 221212261321. The reversal of 221212261250 is 52162212122.

It can be written as a sum of positive squares in 8 ways, for example, as 668377609 + 220543883641 = 25853^2 + 469621^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=332575.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 881323625 + ... + 881323875.

Almost surely, 2221212261250 is an apocalyptic number.

221212261250 is a deficient number, since it is larger than the sum of its proper divisors (203089432027).

221212261250 is an frugal number, since it uses more digits than its factorization.

221212261250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 221212261250 its reverse (52162212122), we get a palindrome (273374473372).

The spelling of 221212261250 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred sixty-one thousand, two hundred fifty".

Divisors: 1 2 5 10 25 50 53 106 125 250 251 265 502 530 625 1250 1255 1325 2510 2650 2809 5618 6275 6625 12550 13250 13303 14045 26606 28090 31375 33125 62750 63001 66250 66515 70225 126002 133030 140450 156875 313750 315005 332575 351125 630010 665150 702250 705059 1410118 1575025 1662875 1755625 3150050 3325750 3339053 3511250 3525295 6678106 7050590 7875125 8314375 15750250 16628750 16695265 17626475 33390530 35252950 39375625 78751250 83476325 88132375 166952650 176264750 176969809 353939618 417381625 440661875 834763250 881323750 884849045 1769698090 2086908125 4173816250 4424245225 8848490450 22121226125 44242452250 110606130625 221212261250