520235031 has 12 divisors (see below), whose sum is σ = 718393832. Its totient is φ = 334862304.

The previous prime is 520235021. The next prime is 520235041. The reversal of 520235031 is 130532025.

It is an interprime number because it is at equal distance from previous prime (520235021) and next prime (520235041).

It is not a de Polignac number, because 520235031 - 2⁷ = 520234903 is a prime.

It is a super-2 number, since 2×520235031² = 541288974959141922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520234989 and 520235007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520235021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100576 + ... + 105621.

Almost surely, 2^520235031 is an apocalyptic number.

520235031 is a deficient number, since it is larger than the sum of its proper divisors (198158801).

520235031 is a wasteful number, since it uses less digits than its factorization.

520235031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206258 (or 206229 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520235031 is about 22808.6613153863. The cubic root of 520235031 is about 804.2662866996.

Adding to 520235031 its reverse (130532025), we get a palindrome (650767056).

The spelling of 520235031 in words is "five hundred twenty million, two hundred thirty-five thousand, thirty-one".