520113555 has 144 divisors (see below), whose sum is σ = 1079114400. Its totient is φ = 239376384.

The previous prime is 520113547. The next prime is 520113631. The reversal of 520113555 is 555311025.

520113555 is a `hidden beast` number, since 520 + 1 + 135 + 5 + 5 = 666.

It is not a de Polignac number, because 520113555 - 2³ = 520113547 is a prime.

It is a super-2 number, since 2×520113555² = 541036220189476050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3490621 + ... + 3490769.

It is an arithmetic number, because the mean of its divisors is an integer number (7493850).

Almost surely, 2^520113555 is an apocalyptic number.

520113555 is an abundant number, since it is smaller than the sum of its proper divisors (559000845).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520113555 is a wasteful number, since it uses less digits than its factorization.

520113555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 520113555 is about 22805.9982241515. The cubic root of 520113555 is about 804.2036825233.

The spelling of 520113555 in words is "five hundred twenty million, one hundred thirteen thousand, five hundred fifty-five".