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31103232203221 = 64451482587271
BaseRepresentation
bin1110001001001110010010…
…00110110101100111010101
311002010102212201201110111021
413010213021012311213111
513034043404421000341
6150052343322041141
76360064042366603
oct704471106654725
9132112781643437
1031103232203221
119a018967a0182
1235a40216491b1
131448039a4cab9
14797593c22873
1538e0ee3d99d1
hex1c49c91b59d5

31103232203221 has 4 divisors (see below), whose sum is σ = 31103714854944. Its totient is φ = 31102749551500.

The previous prime is 31103232203177. The next prime is 31103232203233. The reversal of 31103232203221 is 12230223230113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31103232203221 is a prime.

It is a super-2 number, since 2×311032322032212 (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103232200221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241229185 + ... + 241358086.

It is an arithmetic number, because the mean of its divisors is an integer number (7775928713736).

Almost surely, 231103232203221 is an apocalyptic number.

It is an amenable number.

31103232203221 is a deficient number, since it is larger than the sum of its proper divisors (482651723).

31103232203221 is an equidigital number, since it uses as much as digits as its factorization.

31103232203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482651722.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31103232203221 its reverse (12230223230113), we get a palindrome (43333455433334).

The spelling of 31103232203221 in words is "thirty-one trillion, one hundred three billion, two hundred thirty-two million, two hundred three thousand, two hundred twenty-one".

Divisors: 1 64451 482587271 31103232203221