521457113281 has 12 divisors (see below), whose sum is σ = 568965109680. Its totient is φ = 477670617840.

The previous prime is 521457113251. The next prime is 521457113311. The reversal of 521457113281 is 182311754125.

It is an interprime number because it is at equal distance from previous prime (521457113251) and next prime (521457113311).

It is not a de Polignac number, because 521457113281 - 2²⁵ = 521423558849 is a prime.

It is a super-2 number, since 2×521457113281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521457113251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11754751 + ... + 11799028.

It is an arithmetic number, because the mean of its divisors is an integer number (47413759140).

Almost surely, 2^521457113281 is an apocalyptic number.

It is an amenable number.

521457113281 is a deficient number, since it is larger than the sum of its proper divisors (47507996399).

521457113281 is a wasteful number, since it uses less digits than its factorization.

521457113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23553936 (or 23553923 counting only the distinct ones).

The product of its digits is 67200, while the sum is 40.

The spelling of 521457113281 in words is "five hundred twenty-one billion, four hundred fifty-seven million, one hundred thirteen thousand, two hundred eighty-one".