21332325 has 48 divisors (see below), whose sum is σ = 40711680. Its totient is φ = 9654720.

The previous prime is 21332261. The next prime is 21332329. The reversal of 21332325 is 52323312.

It is not a de Polignac number, because 21332325 - 2⁶ = 21332261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93862 + ... + 94088.

It is an arithmetic number, because the mean of its divisors is an integer number (848160).

Almost surely, 2^21332325 is an apocalyptic number.

21332325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21332325 is a deficient number, since it is larger than the sum of its proper divisors (19379355).

21332325 is a wasteful number, since it uses less digits than its factorization.

21332325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 421 counting only the distinct ones).

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

The square root of 21332325 is about 4618.6929969419. The cubic root of 21332325 is about 277.3401400509.

Adding to 21332325 its reverse (52323312), we get a palindrome (73655637).

The spelling of 21332325 in words is "twenty-one million, three hundred thirty-two thousand, three hundred twenty-five".