315656253481 has 2 divisors, whose sum is σ = 315656253482. Its totient is φ = 315656253480.

The previous prime is 315656253457. The next prime is 315656253499. The reversal of 315656253481 is 184352656513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293547240000 + 22109013481 = 541800^2 + 148691^2 .

It is a cyclic number.

It is not a de Polignac number, because 315656253481 - 2⁵ = 315656253449 is a prime.

It is a super-2 number, since 2×315656253481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315656233481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157828126740 + 157828126741.

It is an arithmetic number, because the mean of its divisors is an integer number (157828126741).

Almost surely, 2^315656253481 is an apocalyptic number.

It is an amenable number.

315656253481 is a deficient number, since it is larger than the sum of its proper divisors (1).

315656253481 is an equidigital number, since it uses as much as digits as its factorization.

315656253481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592000, while the sum is 49.

The spelling of 315656253481 in words is "three hundred fifteen billion, six hundred fifty-six million, two hundred fifty-three thousand, four hundred eighty-one".