502309431 has 28 divisors (see below), whose sum is σ = 811067208. Its totient is φ = 309107664.

The previous prime is 502309427. The next prime is 502309433. The reversal of 502309431 is 134903205.

It is not a de Polignac number, because 502309431 - 2² = 502309427 is a prime.

It is a super-2 number, since 2×502309431² = 504629528943087522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 502309395 and 502309404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502309433) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 17025 + ... + 35978.

It is an arithmetic number, because the mean of its divisors is an integer number (28966686).

Almost surely, 2^502309431 is an apocalyptic number.

502309431 is a deficient number, since it is larger than the sum of its proper divisors (308757777).

502309431 is an equidigital number, since it uses as much as digits as its factorization.

502309431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53034 (or 53019 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 502309431 is about 22412.2607293419. The cubic root of 502309431 is about 794.9206471170.

The spelling of 502309431 in words is "five hundred two million, three hundred nine thousand, four hundred thirty-one".