40255431 has 4 divisors (see below), whose sum is σ = 53673912. Its totient is φ = 26836952.

The previous prime is 40255429. The next prime is 40255447. The reversal of 40255431 is 13455204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40255431 - 2¹ = 40255429 is a prime.

It is a super-2 number, since 2×40255431² = 3240999449991522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40255421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6709236 + ... + 6709241.

It is an arithmetic number, because the mean of its divisors is an integer number (13418478).

Almost surely, 2^40255431 is an apocalyptic number.

40255431 is a deficient number, since it is larger than the sum of its proper divisors (13418481).

40255431 is a wasteful number, since it uses less digits than its factorization.

40255431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13418480.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 40255431 is about 6344.7167785489. The cubic root of 40255431 is about 342.7216133725.

The spelling of 40255431 in words is "forty million, two hundred fifty-five thousand, four hundred thirty-one".