315450225556021 has 16 divisors (see below), whose sum is σ = 318615238150000. Its totient is φ = 312290165311488.

The previous prime is 315450225556013. The next prime is 315450225556051. The reversal of 315450225556021 is 120655522054513.

It can be written as a sum of positive squares in 8 ways, for example, as 96586635622500 + 218863589933521 = 9827850^2 + 14794039^2 .

It is a cyclic number.

It is not a de Polignac number, because 315450225556021 - 2³ = 315450225556013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315450225556051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3435744511 + ... + 3435836323.

It is an arithmetic number, because the mean of its divisors is an integer number (19913452384375).

Almost surely, 2^{315450225556021} is an apocalyptic number.

It is an amenable number.

315450225556021 is a deficient number, since it is larger than the sum of its proper divisors (3165012593979).

315450225556021 is a wasteful number, since it uses less digits than its factorization.

315450225556021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118408.

The product of its (nonzero) digits is 1800000, while the sum is 46.

The spelling of 315450225556021 in words is "three hundred fifteen trillion, four hundred fifty billion, two hundred twenty-five million, five hundred fifty-six thousand, twenty-one".