315254402742421 has 4 divisors (see below), whose sum is σ = 315254469031744. Its totient is φ = 315254336453100.

The previous prime is 315254402742311. The next prime is 315254402742443. The reversal of 315254402742421 is 124247204452513.

It is a happy number.

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 315254402742421 - 2²⁷ = 315254268524693 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 (315254402742481) 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, 25409295 + ... + 35723116.

It is an arithmetic number, because the mean of its divisors is an integer number (78813617257936).

Almost surely, 2^{315254402742421} is an apocalyptic number.

It is an amenable number.

315254402742421 is a deficient number, since it is larger than the sum of its proper divisors (66289323).

315254402742421 is an equidigital number, since it uses as much as digits as its factorization.

315254402742421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66289322.

The product of its (nonzero) digits is 2150400, while the sum is 46.

The spelling of 315254402742421 in words is "three hundred fifteen trillion, two hundred fifty-four billion, four hundred two million, seven hundred forty-two thousand, four hundred twenty-one".