521105057 has 8 divisors (see below), whose sum is σ = 574866720. Its totient is φ = 468408160.

The previous prime is 521105041. The next prime is 521105107. The reversal of 521105057 is 750501125.

It is a happy number.

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

It is not a de Polignac number, because 521105057 - 2⁴ = 521105041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521105017) 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 7 ways as a sum of consecutive naturals, for example, 265163 + ... + 267120.

It is an arithmetic number, because the mean of its divisors is an integer number (71858340).

Almost surely, 2^521105057 is an apocalyptic number.

It is an amenable number.

521105057 is a deficient number, since it is larger than the sum of its proper divisors (53761663).

521105057 is a wasteful number, since it uses less digits than its factorization.

521105057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532383.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 521105057 is about 22827.7256203942. The cubic root of 521105057 is about 804.7143808813.

The spelling of 521105057 in words is "five hundred twenty-one million, one hundred five thousand, fifty-seven".