113103400431 has 32 divisors (see below), whose sum is σ = 181650012160. Its totient is φ = 61150938336.

The previous prime is 113103400387. The next prime is 113103400483. The reversal of 113103400431 is 134004301311.

It is not a de Polignac number, because 113103400431 - 2⁹ = 113103399919 is a prime.

It is a super-2 number, since 2×113103400431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113103400398 and 113103400407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113103405431) 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, 133920 + ... + 494106.

It is an arithmetic number, because the mean of its divisors is an integer number (5676562880).

Almost surely, 2^113103400431 is an apocalyptic number.

113103400431 is a deficient number, since it is larger than the sum of its proper divisors (68546611729).

113103400431 is a wasteful number, since it uses less digits than its factorization.

113103400431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361003.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 113103400431 its reverse (134004301311), we get a palindrome (247107701742).

The spelling of 113103400431 in words is "one hundred thirteen billion, one hundred three million, four hundred thousand, four hundred thirty-one".