315631547939 has 2 divisors, whose sum is σ = 315631547940. Its totient is φ = 315631547938.

The previous prime is 315631547911. The next prime is 315631547981. The reversal of 315631547939 is 939745136513.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315631547939 is a prime.

It is not a weakly prime, because it can be changed into another prime (315631747939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157815773969 + 157815773970.

It is an arithmetic number, because the mean of its divisors is an integer number (157815773970).

Almost surely, 2^315631547939 is an apocalyptic number.

315631547939 is a deficient number, since it is larger than the sum of its proper divisors (1).

315631547939 is an equidigital number, since it uses as much as digits as its factorization.

315631547939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 56.

The spelling of 315631547939 in words is "three hundred fifteen billion, six hundred thirty-one million, five hundred forty-seven thousand, nine hundred thirty-nine".