31324556040431 has 2 divisors, whose sum is σ = 31324556040432. Its totient is φ = 31324556040430.

The previous prime is 31324556040403. The next prime is 31324556040443. The reversal of 31324556040431 is 13404065542313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31324556040431 - 2⁴² = 26926509529327 is a prime.

It is a super-2 number, since 2×31324556040431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31324556040131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662278020215 + 15662278020216.

It is an arithmetic number, because the mean of its divisors is an integer number (15662278020216).

Almost surely, 2^{31324556040431} is an apocalyptic number.

31324556040431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31324556040431 is an equidigital number, since it uses as much as digits as its factorization.

31324556040431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 31324556040431 in words is "thirty-one trillion, three hundred twenty-four billion, five hundred fifty-six million, forty thousand, four hundred thirty-one".