315506121 has 16 divisors (see below), whose sum is σ = 482160000. Its totient is φ = 179768448.

The previous prime is 315506083. The next prime is 315506131. The reversal of 315506121 is 121605513.

It is not a de Polignac number, because 315506121 - 2¹⁸ = 315243977 is a prime.

It is a super-2 number, since 2×315506121² = 199088224776933282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315506091 and 315506100.

It is not an unprimeable number, because it can be changed into a prime (315506131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14196 + ... + 28853.

It is an arithmetic number, because the mean of its divisors is an integer number (30135000).

Almost surely, 2^315506121 is an apocalyptic number.

It is an amenable number.

315506121 is a deficient number, since it is larger than the sum of its proper divisors (166653879).

315506121 is a wasteful number, since it uses less digits than its factorization.

315506121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43408.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 315506121 is about 17762.4919704415. The cubic root of 315506121 is about 680.7734286519.

The spelling of 315506121 in words is "three hundred fifteen million, five hundred six thousand, one hundred twenty-one".