315445626121 has 4 divisors (see below), whose sum is σ = 318568850244. Its totient is φ = 312322402000.

The previous prime is 315445626113. The next prime is 315445626157. The reversal of 315445626121 is 121626544513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129394881225 + 186050744896 = 359715^2 + 431336^2 .

It is a cyclic number.

It is not a de Polignac number, because 315445626121 - 2³ = 315445626113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315445626161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561611910 + ... + 1561612111.

It is an arithmetic number, because the mean of its divisors is an integer number (79642212561).

Almost surely, 2^315445626121 is an apocalyptic number.

It is an amenable number.

315445626121 is a deficient number, since it is larger than the sum of its proper divisors (3123224123).

315445626121 is a wasteful number, since it uses less digits than its factorization.

315445626121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123224122.

The product of its digits is 172800, while the sum is 40.

The spelling of 315445626121 in words is "three hundred fifteen billion, four hundred forty-five million, six hundred twenty-six thousand, one hundred twenty-one".