31313220058987 has 2 divisors, whose sum is σ = 31313220058988. Its totient is φ = 31313220058986.

The previous prime is 31313220058963. The next prime is 31313220059083. The reversal of 31313220058987 is 78985002231313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31313220058987 - 2²³ = 31313211670379 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313220058957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656610029493 + 15656610029494.

It is an arithmetic number, because the mean of its divisors is an integer number (15656610029494).

Almost surely, 2^{31313220058987} is an apocalyptic number.

31313220058987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313220058987 is an equidigital number, since it uses as much as digits as its factorization.

31313220058987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 31313220058987 in words is "thirty-one trillion, three hundred thirteen billion, two hundred twenty million, fifty-eight thousand, nine hundred eighty-seven".