113233431 has 32 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 70744320.

The previous prime is 113233409. The next prime is 113233441. The reversal of 113233431 is 134332311.

It is not a de Polignac number, because 113233431 - 2¹⁵ = 113200663 is a prime.

It is a super-2 number, since 2×113233431² = 25643619792063522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113233398 and 113233407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113233441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 632500 + ... + 632678.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^113233431 is an apocalyptic number.

113233431 is a deficient number, since it is larger than the sum of its proper divisors (47643369).

113233431 is a wasteful number, since it uses less digits than its factorization.

113233431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 648, while the sum is 21.

The square root of 113233431 is about 10641.1198188912. The cubic root of 113233431 is about 483.7914872043.

Adding to 113233431 its reverse (134332311), we get a palindrome (247565742).

The spelling of 113233431 in words is "one hundred thirteen million, two hundred thirty-three thousand, four hundred thirty-one".