32021521452 has 48 divisors (see below), whose sum is σ = 84257864320. Its totient is φ = 10514527056.

The previous prime is 32021521451. The next prime is 32021521457. The reversal of 32021521452 is 25412512023.

32021521452 is a `hidden beast` number, since 3 + 202 + 1 + 5 + 2 + 1 + 452 = 666.

It is a super-2 number, since 2×32021521452² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (32021521451) 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, 2205418 + ... + 2219889.

Almost surely, 2^32021521452 is an apocalyptic number.

It is an amenable number.

32021521452 is an abundant number, since it is smaller than the sum of its proper divisors (52236342868).

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

32021521452 is a wasteful number, since it uses less digits than its factorization.

32021521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425387 (or 4425379 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 32021521452 in words is "thirty-two billion, twenty-one million, five hundred twenty-one thousand, four hundred fifty-two".