521974132 has 24 divisors (see below), whose sum is σ = 951005160. Its totient is φ = 250373760.

The previous prime is 521974129. The next prime is 521974177. The reversal of 521974132 is 231479125.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 182088036 + 339886096 = 13494^2 + 18436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3882 + ... + 32542.

It is an arithmetic number, because the mean of its divisors is an integer number (39625215).

Almost surely, 2^521974132 is an apocalyptic number.

It is an amenable number.

521974132 is a deficient number, since it is larger than the sum of its proper divisors (429031028).

521974132 is a wasteful number, since it uses less digits than its factorization.

521974132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28851 (or 28849 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 521974132 is about 22846.7532047773. The cubic root of 521974132 is about 805.1614876056.

The spelling of 521974132 in words is "five hundred twenty-one million, nine hundred seventy-four thousand, one hundred thirty-two".