520103231 has 4 divisors (see below), whose sum is σ = 528918600. Its totient is φ = 511287864.

The previous prime is 520103203. The next prime is 520103239. The reversal of 520103231 is 132301025.

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

It is a de Polignac number, because none of the positive numbers 2^k-520103231 is a prime.

It is a super-2 number, since 2×520103231² = 541014741793278722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520103239) 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, 4407596 + ... + 4407713.

It is an arithmetic number, because the mean of its divisors is an integer number (132229650).

Almost surely, 2^520103231 is an apocalyptic number.

520103231 is a deficient number, since it is larger than the sum of its proper divisors (8815369).

520103231 is an equidigital number, since it uses as much as digits as its factorization.

520103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8815368.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 520103231 is about 22805.7718790661. The cubic root of 520103231 is about 804.1983614713.

Adding to 520103231 its reverse (132301025), we get a palindrome (652404256).

The spelling of 520103231 in words is "five hundred twenty million, one hundred three thousand, two hundred thirty-one".