31550792491 has 2 divisors, whose sum is σ = 31550792492. Its totient is φ = 31550792490.

The previous prime is 31550792431. The next prime is 31550792509. The reversal of 31550792491 is 19429705513.

It is a strong prime.

It is an emirp because it is prime and its reverse (19429705513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31550792491 - 2²⁵ = 31517238059 is a prime.

It is not a weakly prime, because it can be changed into another prime (31550792431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15775396245 + 15775396246.

It is an arithmetic number, because the mean of its divisors is an integer number (15775396246).

Almost surely, 2^31550792491 is an apocalyptic number.

31550792491 is a deficient number, since it is larger than the sum of its proper divisors (1).

31550792491 is an equidigital number, since it uses as much as digits as its factorization.

31550792491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 31550792491 in words is "thirty-one billion, five hundred fifty million, seven hundred ninety-two thousand, four hundred ninety-one".