520525051 has 4 divisors (see below), whose sum is σ = 521081512. Its totient is φ = 519968592.

The previous prime is 520525037. The next prime is 520525063. The reversal of 520525051 is 150525025.

It is a happy number.

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 520525051 - 2⁹ = 520524539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520525451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276825 + ... + 278698.

It is an arithmetic number, because the mean of its divisors is an integer number (130270378).

Almost surely, 2^520525051 is an apocalyptic number.

520525051 is a deficient number, since it is larger than the sum of its proper divisors (556461).

520525051 is an equidigital number, since it uses as much as digits as its factorization.

520525051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556460.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 520525051 is about 22815.0181021186. The cubic root of 520525051 is about 804.4157127368.

The spelling of 520525051 in words is "five hundred twenty million, five hundred twenty-five thousand, fifty-one".