505131504 has 20 divisors (see below), whose sum is σ = 1304923176. Its totient is φ = 168377152.

The previous prime is 505131493. The next prime is 505131527. The reversal of 505131504 is 405131505.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5261739 + ... + 5261834.

Almost surely, 2^505131504 is an apocalyptic number.

It is an amenable number.

505131504 is an abundant number, since it is smaller than the sum of its proper divisors (799791672).

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

505131504 is a wasteful number, since it uses less digits than its factorization.

505131504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10523584 (or 10523578 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 505131504 is about 22475.1307893859. The cubic root of 505131504 is about 796.4065413195.

Subtracting from 505131504 its reverse (405131505), we obtain a palindrome (99999999).

The spelling of 505131504 in words is "five hundred five million, one hundred thirty-one thousand, five hundred four".