521146056 has 64 divisors (see below), whose sum is σ = 1337083200. Its totient is φ = 169207808.

The previous prime is 521146049. The next prime is 521146069. The reversal of 521146056 is 650641125.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158380 + ... + 161636.

It is an arithmetic number, because the mean of its divisors is an integer number (20891925).

Almost surely, 2^521146056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521146056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668541600).

521146056 is an abundant number, since it is smaller than the sum of its proper divisors (815937144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521146056 is a wasteful number, since it uses less digits than its factorization.

521146056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438 (or 3434 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 521146056 is about 22828.6236115978. The cubic root of 521146056 is about 804.7354845079.

The spelling of 521146056 in words is "five hundred twenty-one million, one hundred forty-six thousand, fifty-six".