21852325 has 24 divisors (see below), whose sum is σ = 29774880. Its totient is φ = 15777600.

The previous prime is 21852317. The next prime is 21852343. The reversal of 21852325 is 52325812.

It is not a de Polignac number, because 21852325 - 2³ = 21852317 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21852293 and 21852302.

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, 62802 + ... + 63148.

It is an arithmetic number, because the mean of its divisors is an integer number (1240620).

Almost surely, 2^21852325 is an apocalyptic number.

21852325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21852325 is the 3817-th pentagonal number.

It is an amenable number.

21852325 is a deficient number, since it is larger than the sum of its proper divisors (7922555).

21852325 is a wasteful number, since it uses less digits than its factorization.

21852325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 592 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 21852325 is about 4674.6470454998. The cubic root of 21852325 is about 279.5755686957.

The spelling of 21852325 in words is "twenty-one million, eight hundred fifty-two thousand, three hundred twenty-five".