113645631 has 16 divisors (see below), whose sum is σ = 174003840. Its totient is φ = 65250720.

The previous prime is 113645627. The next prime is 113645639. The reversal of 113645631 is 136546311.

It is not a de Polignac number, because 113645631 - 2² = 113645627 is a prime.

It is a super-2 number, since 2×113645631² = 25830658890776322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113645639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90000 + ... + 91253.

It is an arithmetic number, because the mean of its divisors is an integer number (10875240).

Almost surely, 2^113645631 is an apocalyptic number.

113645631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

113645631 is a deficient number, since it is larger than the sum of its proper divisors (60358209).

113645631 is a wasteful number, since it uses less digits than its factorization.

113645631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181286.

The product of its digits is 6480, while the sum is 30.

The square root of 113645631 is about 10660.4704868031. The cubic root of 113645631 is about 484.3778198157.

The spelling of 113645631 in words is "one hundred thirteen million, six hundred forty-five thousand, six hundred thirty-one".