31252431971 has 2 divisors, whose sum is σ = 31252431972. Its totient is φ = 31252431970.

The previous prime is 31252431961. The next prime is 31252432031. The reversal of 31252431971 is 17913425213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31252431971 is a prime.

It is not a weakly prime, because it can be changed into another prime (31252431961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626215985 + 15626215986.

It is an arithmetic number, because the mean of its divisors is an integer number (15626215986).

Almost surely, 2^31252431971 is an apocalyptic number.

31252431971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31252431971 is an equidigital number, since it uses as much as digits as its factorization.

31252431971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The spelling of 31252431971 in words is "thirty-one billion, two hundred fifty-two million, four hundred thirty-one thousand, nine hundred seventy-one".