21322521513 has 32 divisors (see below), whose sum is σ = 32240595200. Its totient is φ = 13923705600.

The previous prime is 21322521509. The next prime is 21322521533. The reversal of 21322521513 is 31512522312.

21322521513 is a `hidden beast` number, since 2 + 132 + 2 + 521 + 5 + 1 + 3 = 666.

It is not a de Polignac number, because 21322521513 - 2² = 21322521509 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322521503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370068 + ... + 423786.

It is an arithmetic number, because the mean of its divisors is an integer number (1007518600).

Almost surely, 2^21322521513 is an apocalyptic number.

It is an amenable number.

21322521513 is a deficient number, since it is larger than the sum of its proper divisors (10918073687).

21322521513 is a wasteful number, since it uses less digits than its factorization.

21322521513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54030 (or 54024 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The spelling of 21322521513 in words is "twenty-one billion, three hundred twenty-two million, five hundred twenty-one thousand, five hundred thirteen".