315525417244621 has 4 divisors (see below), whose sum is σ = 315656286354144. Its totient is φ = 315394548135100.

The previous prime is 315525417244577. The next prime is 315525417244693. The reversal of 315525417244621 is 126442714525513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315525417244621 - 2²⁵ = 315525383690189 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 (315525417241621) 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, 65434551145 + ... + 65434555966.

It is an arithmetic number, because the mean of its divisors is an integer number (78914071588536).

Almost surely, 2^{315525417244621} is an apocalyptic number.

It is an amenable number.

315525417244621 is a deficient number, since it is larger than the sum of its proper divisors (130869109523).

315525417244621 is a wasteful number, since it uses less digits than its factorization.

315525417244621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130869109522.

The product of its digits is 8064000, while the sum is 52.

The spelling of 315525417244621 in words is "three hundred fifteen trillion, five hundred twenty-five billion, four hundred seventeen million, two hundred forty-four thousand, six hundred twenty-one".