315063921 has 4 divisors (see below), whose sum is σ = 420085232. Its totient is φ = 210042612.

The previous prime is 315063911. The next prime is 315063923. The reversal of 315063921 is 129360513.

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 not a de Polignac number, because 315063921 - 2⁹ = 315063409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315063923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52510651 + ... + 52510656.

It is an arithmetic number, because the mean of its divisors is an integer number (105021308).

Almost surely, 2^315063921 is an apocalyptic number.

It is an amenable number.

315063921 is a deficient number, since it is larger than the sum of its proper divisors (105021311).

315063921 is a wasteful number, since it uses less digits than its factorization.

315063921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105021310.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 315063921 is about 17750.0400281239. The cubic root of 315063921 is about 680.4552322257.

The spelling of 315063921 in words is "three hundred fifteen million, sixty-three thousand, nine hundred twenty-one".