520238691 has 12 divisors (see below), whose sum is σ = 858806832. Its totient is φ = 297279216.

The previous prime is 520238689. The next prime is 520238713. The reversal of 520238691 is 196832025.

It is not a de Polignac number, because 520238691 - 2¹ = 520238689 is a prime.

It is a super-2 number, since 2×520238691² = 541296591226786962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520238651) 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, 4128816 + ... + 4128941.

It is an arithmetic number, because the mean of its divisors is an integer number (71567236).

Almost surely, 2^520238691 is an apocalyptic number.

520238691 is a deficient number, since it is larger than the sum of its proper divisors (338568141).

520238691 is a wasteful number, since it uses less digits than its factorization.

520238691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257770 (or 8257767 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 520238691 is about 22808.7415479241. The cubic root of 520238691 is about 804.2681727751.

The spelling of 520238691 in words is "five hundred twenty million, two hundred thirty-eight thousand, six hundred ninety-one".