21933325 has 6 divisors (see below), whose sum is σ = 27197354. Its totient is φ = 17546640.

The previous prime is 21933293. The next prime is 21933347. The reversal of 21933325 is 52333912.

It can be written as a sum of positive squares in 3 ways, for example, as 1121481 + 20811844 = 1059^2 + 4562^2 .

It is not a de Polignac number, because 21933325 - 2⁵ = 21933293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21933293 and 21933302.

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 5 ways as a sum of consecutive naturals, for example, 438642 + ... + 438691.

Almost surely, 2^21933325 is an apocalyptic number.

21933325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21933325 is a deficient number, since it is larger than the sum of its proper divisors (5264029).

21933325 is an equidigital number, since it uses as much as digits as its factorization.

21933325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877343 (or 877338 counting only the distinct ones).

The product of its digits is 4860, while the sum is 28.

The square root of 21933325 is about 4683.3027875635. The cubic root of 21933325 is about 279.9205769633.

The spelling of 21933325 in words is "twenty-one million, nine hundred thirty-three thousand, three hundred twenty-five".