315006231661081 has 2 divisors, whose sum is σ = 315006231661082. Its totient is φ = 315006231661080.

The previous prime is 315006231661063. The next prime is 315006231661097. The reversal of 315006231661081 is 180166132600513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302154608934025 + 12851622727056 = 17382595^2 + 3584916^2 .

It is a cyclic number.

It is not a de Polignac number, because 315006231661081 - 2³⁹ = 314456475847193 is a prime.

It is a super-2 number, since 2×315006231661081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315006231961081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157503115830540 + 157503115830541.

It is an arithmetic number, because the mean of its divisors is an integer number (157503115830541).

Almost surely, 2^{315006231661081} is an apocalyptic number.

It is an amenable number.

315006231661081 is a deficient number, since it is larger than the sum of its proper divisors (1).

315006231661081 is an equidigital number, since it uses as much as digits as its factorization.

315006231661081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 315006231661081 in words is "three hundred fifteen trillion, six billion, two hundred thirty-one million, six hundred sixty-one thousand, eighty-one".