315444602509021 has 2 divisors, whose sum is σ = 315444602509022. Its totient is φ = 315444602509020.

The previous prime is 315444602508923. The next prime is 315444602509061. The reversal of 315444602509021 is 120905206444513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314111995472025 + 1332607036996 = 17723205^2 + 1154386^2 .

It is a cyclic number.

It is not a de Polignac number, because 315444602509021 - 2¹³ = 315444602500829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315444602509061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157722301254510 + 157722301254511.

It is an arithmetic number, because the mean of its divisors is an integer number (157722301254511).

Almost surely, 2^{315444602509021} is an apocalyptic number.

It is an amenable number.

315444602509021 is a deficient number, since it is larger than the sum of its proper divisors (1).

315444602509021 is an equidigital number, since it uses as much as digits as its factorization.

315444602509021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 315444602509021 in words is "three hundred fifteen trillion, four hundred forty-four billion, six hundred two million, five hundred nine thousand, twenty-one".