31552543091 has 2 divisors, whose sum is σ = 31552543092. Its totient is φ = 31552543090.

The previous prime is 31552543073. The next prime is 31552543171. The reversal of 31552543091 is 19034525513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31552543091 - 2⁶ = 31552543027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31552543291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15776271545 + 15776271546.

It is an arithmetic number, because the mean of its divisors is an integer number (15776271546).

Almost surely, 2^31552543091 is an apocalyptic number.

31552543091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31552543091 is an equidigital number, since it uses as much as digits as its factorization.

31552543091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 31552543091 in words is "thirty-one billion, five hundred fifty-two million, five hundred forty-three thousand, ninety-one".