520620531 has 8 divisors (see below), whose sum is σ = 696393984. Its totient is φ = 345963720.

The previous prime is 520620523. The next prime is 520620553. The reversal of 520620531 is 135026025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520620531 - 2³ = 520620523 is a prime.

It is a super-3 number, since 3×520620531³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (520620511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278071 + ... + 279936.

It is an arithmetic number, because the mean of its divisors is an integer number (87049248).

Almost surely, 2^520620531 is an apocalyptic number.

520620531 is a deficient number, since it is larger than the sum of its proper divisors (175773453).

520620531 is a wasteful number, since it uses less digits than its factorization.

520620531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558321.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 520620531 is about 22817.1104875267. The cubic root of 520620531 is about 804.4648944341.

Adding to 520620531 its reverse (135026025), we get a palindrome (655646556).

The spelling of 520620531 in words is "five hundred twenty million, six hundred twenty thousand, five hundred thirty-one".