520025431 has 4 divisors (see below), whose sum is σ = 522665352. Its totient is φ = 517385512.

The previous prime is 520025381. The next prime is 520025533. The reversal of 520025431 is 134520025.

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

It is a cyclic number.

It is not a de Polignac number, because 520025431 - 2²³ = 511636823 is a prime.

It is a super-2 number, since 2×520025431² = 540852897773471522, 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 (520023431) 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, 1319665 + ... + 1320058.

It is an arithmetic number, because the mean of its divisors is an integer number (130666338).

Almost surely, 2^520025431 is an apocalyptic number.

520025431 is a deficient number, since it is larger than the sum of its proper divisors (2639921).

520025431 is a wasteful number, since it uses less digits than its factorization.

520025431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639920.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 520025431 is about 22804.0661067275. The cubic root of 520025431 is about 804.1582606165.

Adding to 520025431 its reverse (134520025), we get a palindrome (654545456).

The spelling of 520025431 in words is "five hundred twenty million, twenty-five thousand, four hundred thirty-one".