40556231 has 2 divisors, whose sum is σ = 40556232. Its totient is φ = 40556230.

The previous prime is 40556227. The next prime is 40556233. The reversal of 40556231 is 13265504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40556231 - 2² = 40556227 is a prime.

It is a super-2 number, since 2×40556231² = 3289615745850722, which contains 22 as substring.

Together with 40556233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40556231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40556233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278115 + 20278116.

It is an arithmetic number, because the mean of its divisors is an integer number (20278116).

Almost surely, 2^40556231 is an apocalyptic number.

40556231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40556231 is an equidigital number, since it uses as much as digits as its factorization.

40556231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 40556231 is about 6368.3774228606. The cubic root of 40556231 is about 343.5731336534.

The spelling of 40556231 in words is "forty million, five hundred fifty-six thousand, two hundred thirty-one".