31540452431 has 2 divisors, whose sum is σ = 31540452432. Its totient is φ = 31540452430.

The previous prime is 31540452397. The next prime is 31540452451. The reversal of 31540452431 is 13425404513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31540452431 - 2⁶ = 31540452367 is a prime.

It is a super-2 number, since 2×31540452431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31540452451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770226215 + 15770226216.

It is an arithmetic number, because the mean of its divisors is an integer number (15770226216).

Almost surely, 2^31540452431 is an apocalyptic number.

31540452431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540452431 is an equidigital number, since it uses as much as digits as its factorization.

31540452431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 31540452431 its reverse (13425404513), we get a palindrome (44965856944).

The spelling of 31540452431 in words is "thirty-one billion, five hundred forty million, four hundred fifty-two thousand, four hundred thirty-one".