521795057 has 8 divisors (see below), whose sum is σ = 616900800. Its totient is φ = 431830224.

The previous prime is 521795047. The next prime is 521795083. The reversal of 521795057 is 750597125.

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

It is not a de Polignac number, because 521795057 - 2¹⁰ = 521794033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521795047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285007 + ... + 1285412.

It is an arithmetic number, because the mean of its divisors is an integer number (77112600).

Almost surely, 2^521795057 is an apocalyptic number.

It is an amenable number.

521795057 is a deficient number, since it is larger than the sum of its proper divisors (95105743).

521795057 is a wasteful number, since it uses less digits than its factorization.

521795057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570455.

The product of its (nonzero) digits is 110250, while the sum is 41.

The square root of 521795057 is about 22842.8338215730. The cubic root of 521795057 is about 805.0694008039.

The spelling of 521795057 in words is "five hundred twenty-one million, seven hundred ninety-five thousand, fifty-seven".