40131931 has 12 divisors (see below), whose sum is σ = 46828920. Its totient is φ = 34292160.

The previous prime is 40131929. The next prime is 40131953. The reversal of 40131931 is 13913104.

It is not a de Polignac number, because 40131931 - 2¹ = 40131929 is a prime.

It is a super-2 number, since 2×40131931² = 3221143771577522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17491 + ... + 19651.

It is an arithmetic number, because the mean of its divisors is an integer number (3902410).

Almost surely, 2^40131931 is an apocalyptic number.

40131931 is a deficient number, since it is larger than the sum of its proper divisors (6696989).

40131931 is a wasteful number, since it uses less digits than its factorization.

40131931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 40131931 is about 6334.9767955376. The cubic root of 40131931 is about 342.3707747705.

The spelling of 40131931 in words is "forty million, one hundred thirty-one thousand, nine hundred thirty-one".