520549139 has 12 divisors (see below), whose sum is σ = 575705928. Its totient is φ = 470305440.

The previous prime is 520549121. The next prime is 520549147. The reversal of 520549139 is 931945025.

It is not a de Polignac number, because 520549139 - 2⁸ = 520548883 is a prime.

It is a super-2 number, since 2×520549139² = 541942812227282642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520549109) 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, 6527 + ... + 32919.

It is an arithmetic number, because the mean of its divisors is an integer number (47975494).

Almost surely, 2^520549139 is an apocalyptic number.

520549139 is a deficient number, since it is larger than the sum of its proper divisors (55156789).

520549139 is a wasteful number, since it uses less digits than its factorization.

520549139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26578 (or 26567 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 520549139 is about 22815.5459939051. The cubic root of 520549139 is about 804.4281210200.

The spelling of 520549139 in words is "five hundred twenty million, five hundred forty-nine thousand, one hundred thirty-nine".