315005556163321 has 4 divisors (see below), whose sum is σ = 319320700768372. Its totient is φ = 310690411558272.

The previous prime is 315005556163303. The next prime is 315005556163343. The reversal of 315005556163321 is 123361655500513.

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 74757881157696 + 240247675005625 = 8646264^2 + 15499925^2 .

It is a cyclic number.

It is not a de Polignac number, because 315005556163321 - 2⁵ = 315005556163289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315005556163381) 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, 2157572302416 + ... + 2157572302561.

It is an arithmetic number, because the mean of its divisors is an integer number (79830175192093).

Almost surely, 2^{315005556163321} is an apocalyptic number.

It is an amenable number.

315005556163321 is a deficient number, since it is larger than the sum of its proper divisors (4315144605051).

315005556163321 is an equidigital number, since it uses as much as digits as its factorization.

315005556163321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315144605050.

The product of its (nonzero) digits is 1215000, while the sum is 46.

The spelling of 315005556163321 in words is "three hundred fifteen trillion, five billion, five hundred fifty-six million, one hundred sixty-three thousand, three hundred twenty-one".