21973325 has 12 divisors (see below), whose sum is σ = 29724288. Its totient is φ = 15980400.

The previous prime is 21973319. The next prime is 21973331. The reversal of 21973325 is 52337912.

It is an interprime number because it is at equal distance from previous prime (21973319) and next prime (21973331).

It is not a de Polignac number, because 21973325 - 2⁴ = 21973309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21973291 and 21973300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39677 + ... + 40226.

It is an arithmetic number, because the mean of its divisors is an integer number (2477024).

Almost surely, 2^21973325 is an apocalyptic number.

21973325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21973325 is a deficient number, since it is larger than the sum of its proper divisors (7750963).

21973325 is a wasteful number, since it uses less digits than its factorization.

21973325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79924 (or 79919 counting only the distinct ones).

The product of its digits is 11340, while the sum is 32.

The square root of 21973325 is about 4687.5713327906. The cubic root of 21973325 is about 280.0906381736.

The spelling of 21973325 in words is "twenty-one million, nine hundred seventy-three thousand, three hundred twenty-five".