113651631 has 24 divisors (see below), whose sum is σ = 170714544. Its totient is φ = 72800640.

The previous prime is 113651627. The next prime is 113651633. The reversal of 113651631 is 136156311.

113651631 is a `hidden beast` number, since 1 + 1 + 3 + 651 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 113651631 - 2² = 113651627 is a prime.

It is a super-2 number, since 2×113651631² = 25833386457920322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113651595 and 113651604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113651633) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 22425 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (7113106).

Almost surely, 2^113651631 is an apocalyptic number.

113651631 is a deficient number, since it is larger than the sum of its proper divisors (57062913).

113651631 is a wasteful number, since it uses less digits than its factorization.

113651631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711 (or 4708 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 113651631 is about 10660.7518965596. The cubic root of 113651631 is about 484.3863440201.

It can be divided in two parts, 11365 and 1631, that added together give a square (12996 = 114²).

The spelling of 113651631 in words is "one hundred thirteen million, six hundred fifty-one thousand, six hundred thirty-one".