40113531 has 12 divisors (see below), whose sum is σ = 58456008. Its totient is φ = 26505024.

The previous prime is 40113511. The next prime is 40113581. The reversal of 40113531 is 13531104.

40113531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40113531 - 2⁵ = 40113499 is a prime.

It is a super-2 number, since 2×40113531² = 3218190738575922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40113511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18705 + ... + 20738.

It is an arithmetic number, because the mean of its divisors is an integer number (4871334).

Almost surely, 2^40113531 is an apocalyptic number.

40113531 is a deficient number, since it is larger than the sum of its proper divisors (18342477).

40113531 is a wasteful number, since it uses less digits than its factorization.

40113531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39562 (or 39559 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 40113531 is about 6333.5243743117. The cubic root of 40113531 is about 342.3184424995.

Adding to 40113531 its reverse (13531104), we get a palindrome (53644635).

The spelling of 40113531 in words is "forty million, one hundred thirteen thousand, five hundred thirty-one".