31212046487 has 2 divisors, whose sum is σ = 31212046488. Its totient is φ = 31212046486.

The previous prime is 31212046471. The next prime is 31212046531. The reversal of 31212046487 is 78464021213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31212046487 - 2⁴ = 31212046471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31212046487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31212046447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606023243 + 15606023244.

It is an arithmetic number, because the mean of its divisors is an integer number (15606023244).

Almost surely, 2^31212046487 is an apocalyptic number.

31212046487 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212046487 is an equidigital number, since it uses as much as digits as its factorization.

31212046487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 31212046487 in words is "thirty-one billion, two hundred twelve million, forty-six thousand, four hundred eighty-seven".