521521051057 has 8 divisors (see below), whose sum is σ = 527120015072. Its totient is φ = 515926627200.

The previous prime is 521521051013. The next prime is 521521051067. The reversal of 521521051057 is 750150125125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521521051057 - 2⁷ = 521521050929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521521051067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903819 + ... + 1363792.

It is an arithmetic number, because the mean of its divisors is an integer number (65890001884).

Almost surely, 2^521521051057 is an apocalyptic number.

It is an amenable number.

521521051057 is a deficient number, since it is larger than the sum of its proper divisors (5598964015).

521521051057 is a wasteful number, since it uses less digits than its factorization.

521521051057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270079.

The product of its (nonzero) digits is 17500, while the sum is 34.

The spelling of 521521051057 in words is "five hundred twenty-one billion, five hundred twenty-one million, fifty-one thousand, fifty-seven".