315445234631081 has 2 divisors, whose sum is σ = 315445234631082. Its totient is φ = 315445234631080.

The previous prime is 315445234631053. The next prime is 315445234631173. The reversal of 315445234631081 is 180136432544513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275186958337600 + 40258276293481 = 16588760^2 + 6344941^2 .

It is a cyclic number.

It is not a de Polignac number, because 315445234631081 - 2¹⁸ = 315445234368937 is a prime.

It is a super-2 number, since 2×315445234631081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315445234651081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157722617315540 + 157722617315541.

It is an arithmetic number, because the mean of its divisors is an integer number (157722617315541).

Almost surely, 2^{315445234631081} is an apocalyptic number.

It is an amenable number.

315445234631081 is a deficient number, since it is larger than the sum of its proper divisors (1).

315445234631081 is an equidigital number, since it uses as much as digits as its factorization.

315445234631081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 315445234631081 in words is "three hundred fifteen trillion, four hundred forty-five billion, two hundred thirty-four million, six hundred thirty-one thousand, eighty-one".