520788155 has 4 divisors (see below), whose sum is σ = 624945792. Its totient is φ = 416630520.

The previous prime is 520788139. The next prime is 520788181. The reversal of 520788155 is 551887025.

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

It is not a de Polignac number, because 520788155 - 2⁴ = 520788139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52078811 + ... + 52078820.

It is an arithmetic number, because the mean of its divisors is an integer number (156236448).

Almost surely, 2^520788155 is an apocalyptic number.

520788155 is a deficient number, since it is larger than the sum of its proper divisors (104157637).

520788155 is a wasteful number, since it uses less digits than its factorization.

520788155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104157636.

The product of its (nonzero) digits is 112000, while the sum is 41.

The square root of 520788155 is about 22820.7834002253. The cubic root of 520788155 is about 804.5512229247.

The spelling of 520788155 in words is "five hundred twenty million, seven hundred eighty-eight thousand, one hundred fifty-five".