521350032 has 80 divisors (see below), whose sum is σ = 1548293760. Its totient is φ = 148079616.

The previous prime is 521350031. The next prime is 521350051. The reversal of 521350032 is 230053125.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 521349990 and 521350008.

It is not an unprimeable number, because it can be changed into a prime (521350031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53644 + ... + 62612.

It is an arithmetic number, because the mean of its divisors is an integer number (19353672).

Almost surely, 2^521350032 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 521350032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774146880).

521350032 is an abundant number, since it is smaller than the sum of its proper divisors (1026943728).

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

521350032 is a wasteful number, since it uses less digits than its factorization.

521350032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9154 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 521350032 is about 22833.0907237719. The cubic root of 521350032 is about 804.8404616778.

The spelling of 521350032 in words is "five hundred twenty-one million, three hundred fifty thousand, thirty-two".