31230404987 has 2 divisors, whose sum is σ = 31230404988. Its totient is φ = 31230404986.

The previous prime is 31230404903. The next prime is 31230405007. The reversal of 31230404987 is 78940403213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31230404987 - 2⁸ = 31230404731 is a prime.

It is not a weakly prime, because it can be changed into another prime (31230404087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615202493 + 15615202494.

It is an arithmetic number, because the mean of its divisors is an integer number (15615202494).

Almost surely, 2^31230404987 is an apocalyptic number.

31230404987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230404987 is an equidigital number, since it uses as much as digits as its factorization.

31230404987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 31230404987 in words is "thirty-one billion, two hundred thirty million, four hundred four thousand, nine hundred eighty-seven".