521120056 has 8 divisors (see below), whose sum is σ = 977100120. Its totient is φ = 260560024.

The previous prime is 521120029. The next prime is 521120069. The reversal of 521120056 is 650021125.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×521120056² = 543132225530886272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32569996 + ... + 32570011.

It is an arithmetic number, because the mean of its divisors is an integer number (122137515).

Almost surely, 2^521120056 is an apocalyptic number.

It is an amenable number.

521120056 is a deficient number, since it is larger than the sum of its proper divisors (455980064).

521120056 is a wasteful number, since it uses less digits than its factorization.

521120056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65140013 (or 65140009 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 521120056 is about 22828.0541439694. The cubic root of 521120056 is about 804.7221015223.

The spelling of 521120056 in words is "five hundred twenty-one million, one hundred twenty thousand, fifty-six".