521376057 has 6 divisors (see below), whose sum is σ = 753098762. Its totient is φ = 347584032.

The previous prime is 521376041. The next prime is 521376061. The reversal of 521376057 is 750673125.

It can be written as a sum of positive squares in only one way, i.e., 410305536 + 111070521 = 20256^2 + 10539^2 .

It is not a de Polignac number, because 521376057 - 2⁴ = 521376041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521376257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28965328 + ... + 28965345.

Almost surely, 2^521376057 is an apocalyptic number.

It is an amenable number.

521376057 is a deficient number, since it is larger than the sum of its proper divisors (231722705).

521376057 is a wasteful number, since it uses less digits than its factorization.

521376057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57930679 (or 57930676 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 521376057 is about 22833.6606132263. The cubic root of 521376057 is about 804.8538535919.

The spelling of 521376057 in words is "five hundred twenty-one million, three hundred seventy-six thousand, fifty-seven".