315031020 has 48 divisors (see below), whose sum is σ = 928515840. Its totient is φ = 79586496.

The previous prime is 315031009. The next prime is 315031049. The reversal of 315031020 is 20130513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137032 + ... + 139311.

It is an arithmetic number, because the mean of its divisors is an integer number (19344080).

Almost surely, 2^315031020 is an apocalyptic number.

315031020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

315031020 is an abundant number, since it is smaller than the sum of its proper divisors (613484820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315031020 is a wasteful number, since it uses less digits than its factorization.

315031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276374 (or 276372 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 315031020 is about 17749.1132172850. The cubic root of 315031020 is about 680.4315455646.

Adding to 315031020 its reverse (20130513), we get a palindrome (335161533).

It can be divided in two parts, 31503 and 1020, that added together give a palindrome (32523).

The spelling of 315031020 in words is "three hundred fifteen million, thirty-one thousand, twenty".