521315457 has 8 divisors (see below), whose sum is σ = 748555584. Its totient is φ = 320809488.

The previous prime is 521315423. The next prime is 521315467. The reversal of 521315457 is 754513125.

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

It is not a de Polignac number, because 521315457 - 2⁷ = 521315329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521315467) 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, 6683493 + ... + 6683570.

It is an arithmetic number, because the mean of its divisors is an integer number (93569448).

Almost surely, 2^521315457 is an apocalyptic number.

It is an amenable number.

521315457 is a deficient number, since it is larger than the sum of its proper divisors (227240127).

521315457 is a wasteful number, since it uses less digits than its factorization.

521315457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13367079.

The product of its digits is 21000, while the sum is 33.

The square root of 521315457 is about 22832.3335863858. Note that the first 3 decimals coincide. The cubic root of 521315457 is about 804.8226694254.

The spelling of 521315457 in words is "five hundred twenty-one million, three hundred fifteen thousand, four hundred fifty-seven".