501431913 has 24 divisors (see below), whose sum is σ = 754956800. Its totient is φ = 320345280.

The previous prime is 501431863. The next prime is 501431921. The reversal of 501431913 is 319134105.

It is not a de Polignac number, because 501431913 - 2⁸ = 501431657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501431113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20013 + ... + 37461.

Almost surely, 2^501431913 is an apocalyptic number.

It is an amenable number.

501431913 is a deficient number, since it is larger than the sum of its proper divisors (253524887).

501431913 is a wasteful number, since it uses less digits than its factorization.

501431913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17589 (or 17586 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 501431913 is about 22392.6754319353. The cubic root of 501431913 is about 794.4574772519.

The spelling of 501431913 in words is "five hundred one million, four hundred thirty-one thousand, nine hundred thirteen".