521952732 has 144 divisors (see below), whose sum is σ = 1544454912. Its totient is φ = 145566720.

The previous prime is 521952727. The next prime is 521952733. The reversal of 521952732 is 237259125.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521952733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3202083 + ... + 3202245.

Almost surely, 2^521952732 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 521952732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772227456).

521952732 is an abundant number, since it is smaller than the sum of its proper divisors (1022502180).

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

521952732 is a wasteful number, since it uses less digits than its factorization.

521952732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 403 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 521952732 is about 22846.2848620952. The cubic root of 521952732 is about 805.1504840646.

The spelling of 521952732 in words is "five hundred twenty-one million, nine hundred fifty-two thousand, seven hundred thirty-two".