21322553351 has 16 divisors (see below), whose sum is σ = 24310015488. Its totient is φ = 18512551200.

The previous prime is 21322553347. The next prime is 21322553377. The reversal of 21322553351 is 15335522312.

It is not a de Polignac number, because 21322553351 - 2² = 21322553347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322553321) 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, 98561 + ... + 228821.

It is an arithmetic number, because the mean of its divisors is an integer number (1519375968).

Almost surely, 2^21322553351 is an apocalyptic number.

21322553351 is a deficient number, since it is larger than the sum of its proper divisors (2987462137).

21322553351 is a wasteful number, since it uses less digits than its factorization.

21322553351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130942.

The product of its digits is 27000, while the sum is 32.

The spelling of 21322553351 in words is "twenty-one billion, three hundred twenty-two million, five hundred fifty-three thousand, three hundred fifty-one".