521379552 has 24 divisors (see below), whose sum is σ = 1368621576. Its totient is φ = 173793152.

The previous prime is 521379541. The next prime is 521379557. The reversal of 521379552 is 255973125.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 521379552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521379557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2715423 + ... + 2715614.

It is an arithmetic number, because the mean of its divisors is an integer number (57025899).

Almost surely, 2^521379552 is an apocalyptic number.

It is an amenable number.

521379552 is an abundant number, since it is smaller than the sum of its proper divisors (847242024).

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

521379552 is a wasteful number, since it uses less digits than its factorization.

521379552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431050 (or 5431042 counting only the distinct ones).

The product of its digits is 94500, while the sum is 39.

The square root of 521379552 is about 22833.7371448478. The cubic root of 521379552 is about 804.8556520110.

The spelling of 521379552 in words is "five hundred twenty-one million, three hundred seventy-nine thousand, five hundred fifty-two".