315028731 has 4 divisors (see below), whose sum is σ = 420038312. Its totient is φ = 210019152.

The previous prime is 315028673. The next prime is 315028783. The reversal of 315028731 is 137820513.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 315028731 - 2⁶ = 315028667 is a prime.

It is a super-2 number, since 2×315028731² = 198486202710940722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315028331) 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, 52504786 + ... + 52504791.

It is an arithmetic number, because the mean of its divisors is an integer number (105009578).

Almost surely, 2^315028731 is an apocalyptic number.

315028731 is a deficient number, since it is larger than the sum of its proper divisors (105009581).

315028731 is a wasteful number, since it uses less digits than its factorization.

315028731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105009580.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 315028731 is about 17749.0487350731. The cubic root of 315028731 is about 680.4298975665.

The spelling of 315028731 in words is "three hundred fifteen million, twenty-eight thousand, seven hundred thirty-one".