8521305432 has 16 divisors (see below), whose sum is σ = 21303263640. Its totient is φ = 2840435136.

The previous prime is 8521305409. The next prime is 8521305439. The reversal of 8521305432 is 2345031258.

It is a super-2 number, since 2×8521305432² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8521305393 and 8521305402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521305439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177527173 + ... + 177527220.

Almost surely, 2^8521305432 is an apocalyptic number.

It is an amenable number.

8521305432 is an abundant number, since it is smaller than the sum of its proper divisors (12781958208).

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

8521305432 is a wasteful number, since it uses less digits than its factorization.

8521305432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355054402 (or 355054398 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 8521305432 is about 92310.9171875136. The cubic root of 8521305432 is about 2042.5312542790.

The spelling of 8521305432 in words is "eight billion, five hundred twenty-one million, three hundred five thousand, four hundred thirty-two".