21532631325 has 48 divisors (see below), whose sum is σ = 35763960960. Its totient is φ = 11431537920.

The previous prime is 21532631317. The next prime is 21532631347. The reversal of 21532631325 is 52313623512.

It is not a de Polignac number, because 21532631325 - 2³ = 21532631317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29618112 + ... + 29618838.

It is an arithmetic number, because the mean of its divisors is an integer number (745082520).

Almost surely, 2^21532631325 is an apocalyptic number.

21532631325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21532631325 is a deficient number, since it is larger than the sum of its proper divisors (14231329635).

21532631325 is a wasteful number, since it uses less digits than its factorization.

21532631325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006 (or 2001 counting only the distinct ones).

The product of its digits is 32400, while the sum is 33.

The spelling of 21532631325 in words is "twenty-one billion, five hundred thirty-two million, six hundred thirty-one thousand, three hundred twenty-five".