21323325 has 12 divisors (see below), whose sum is σ = 35254688. Its totient is φ = 11372400.

The previous prime is 21323311. The next prime is 21323371. The reversal of 21323325 is 52332312.

It is not a de Polignac number, because 21323325 - 2⁵ = 21323293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142081 + ... + 142230.

Almost surely, 2^21323325 is an apocalyptic number.

21323325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21323325 is a deficient number, since it is larger than the sum of its proper divisors (13931363).

21323325 is a wasteful number, since it uses less digits than its factorization.

21323325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284324 (or 284319 counting only the distinct ones).

The product of its digits is 1080, while the sum is 21.

The square root of 21323325 is about 4617.7185925520. The cubic root of 21323325 is about 277.3011317639.

Adding to 21323325 its reverse (52332312), we get a palindrome (73655637).

The spelling of 21323325 in words is "twenty-one million, three hundred twenty-three thousand, three hundred twenty-five".