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55135240 = 2358316607
BaseRepresentation
bin1101001001010…
…0110000001000
310211202011022221
43102110300020
5103103311430
65245423424
71236433066
oct322246010
9124664287
1055135240
1129138a16
121656ab74
13b565904
147473036
154c9157a
hex3494c08

55135240 has 32 divisors (see below), whose sum is σ = 125556480. Its totient is φ = 21787072.

The previous prime is 55135229. The next prime is 55135243. The reversal of 55135240 is 4253155.

It is not an unprimeable number, because it can be changed into a prime (55135243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4984 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (3923640).

Almost surely, 255135240 is an apocalyptic number.

It is an amenable number.

55135240 is an abundant number, since it is smaller than the sum of its proper divisors (70421240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55135240 is a wasteful number, since it uses less digits than its factorization.

55135240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16701 (or 16697 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55135240 is about 7425.3107679073. The cubic root of 55135240 is about 380.6066947534.

Adding to 55135240 its reverse (4253155), we get a palindrome (59388395).

The spelling of 55135240 in words is "fifty-five million, one hundred thirty-five thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 20 40 83 166 332 415 664 830 1660 3320 16607 33214 66428 83035 132856 166070 332140 664280 1378381 2756762 5513524 6891905 11027048 13783810 27567620 55135240