521420032 has 36 divisors (see below), whose sum is σ = 1189493536. Its totient is φ = 223464960.

The previous prime is 521419967. The next prime is 521420047. The reversal of 521420032 is 230024125.

It is a junction number, because it is equal to n+sod(n) for n = 521419991 and 521420009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143694 + ... + 147277.

Almost surely, 2^521420032 is an apocalyptic number.

It is an amenable number.

521420032 is an abundant number, since it is smaller than the sum of its proper divisors (668073504).

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

521420032 is an equidigital number, since it uses as much as digits as its factorization.

521420032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290994 (or 290980 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 521420032 is about 22834.6235353246. The cubic root of 521420032 is about 804.8764811833.

Adding to 521420032 its reverse (230024125), we get a palindrome (751444157).

The spelling of 521420032 in words is "five hundred twenty-one million, four hundred twenty thousand, thirty-two".