21722854325 has 24 divisors (see below), whose sum is σ = 27155289480. Its totient is φ = 17237606400.

The previous prime is 21722854313. The next prime is 21722854333. The reversal of 21722854325 is 52345822712.

It can be written as a sum of positive squares in 12 ways, for example, as 3097701649 + 18625152676 = 55657^2 + 136474^2 .

It is not a de Polignac number, because 21722854325 - 2¹⁸ = 21722592181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1541411 + ... + 1555439.

It is an arithmetic number, because the mean of its divisors is an integer number (1131470395).

Almost surely, 2^21722854325 is an apocalyptic number.

21722854325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21722854325 is a deficient number, since it is larger than the sum of its proper divisors (5432435155).

21722854325 is a wasteful number, since it uses less digits than its factorization.

21722854325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14537 (or 14532 counting only the distinct ones).

The product of its digits is 268800, while the sum is 41.

The spelling of 21722854325 in words is "twenty-one billion, seven hundred twenty-two million, eight hundred fifty-four thousand, three hundred twenty-five".