31023313309987 has 2 divisors, whose sum is σ = 31023313309988. Its totient is φ = 31023313309986.

The previous prime is 31023313309969. The next prime is 31023313310069. The reversal of 31023313309987 is 78990331332013.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78990331332013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31023313309987 - 2³⁹ = 30473557496099 is a prime.

It is not a weakly prime, because it can be changed into another prime (31023313309687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511656654993 + 15511656654994.

It is an arithmetic number, because the mean of its divisors is an integer number (15511656654994).

Almost surely, 2^{31023313309987} is an apocalyptic number.

31023313309987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31023313309987 is an equidigital number, since it uses as much as digits as its factorization.

31023313309987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 31023313309987 in words is "thirty-one trillion, twenty-three billion, three hundred thirteen million, three hundred nine thousand, nine hundred eighty-seven".