315831636121 has 9 divisors (see below), whose sum is σ = 317236629333. Its totient is φ = 314432845500.

The previous prime is 315831636119. The next prime is 315831636149. The reversal of 315831636121 is 121636138513.

The square root of 315831636121 is 561989.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 315831636121 - 2¹ = 315831636119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315831636181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 141058120 + ... + 141060358.

Almost surely, 2^315831636121 is an apocalyptic number.

315831636121 is the 561989-th square number.

315831636121 is the 280995-th centered octagonal number.

It is an amenable number.

315831636121 is a deficient number, since it is larger than the sum of its proper divisors (1404993212).

315831636121 is an frugal number, since it uses more digits than its factorization.

315831636121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980 (or 2490 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The spelling of 315831636121 in words is "three hundred fifteen billion, eight hundred thirty-one million, six hundred thirty-six thousand, one hundred twenty-one".