315165221321404 has 12 divisors (see below), whose sum is σ = 551667491807824. Its totient is φ = 157545937947744.

The previous prime is 315165221321399. The next prime is 315165221321443. The reversal of 315165221321404 is 404123122561513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9168158904 + ... + 9168193279.

Almost surely, 2^{315165221321404} is an apocalyptic number.

It is an amenable number.

315165221321404 is a deficient number, since it is larger than the sum of its proper divisors (236502270486420).

315165221321404 is a wasteful number, since it uses less digits than its factorization.

315165221321404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18336356484 (or 18336356482 counting only the distinct ones).

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

Adding to 315165221321404 its reverse (404123122561513), we get a palindrome (719288343882917).

The spelling of 315165221321404 in words is "three hundred fifteen trillion, one hundred sixty-five billion, two hundred twenty-one million, three hundred twenty-one thousand, four hundred four".