21627325 has 12 divisors (see below), whose sum is σ = 26912340. Its totient is φ = 17240960.

The previous prime is 21627313. The next prime is 21627341. The reversal of 21627325 is 52372612.

It can be written as a sum of positive squares in 6 ways, for example, as 301401 + 21325924 = 549^2 + 4618^2 .

It is not a de Polignac number, because 21627325 - 2⁷ = 21627197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21627293 and 21627302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6561 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (2242695).

Almost surely, 2^21627325 is an apocalyptic number.

21627325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21627325 is a deficient number, since it is larger than the sum of its proper divisors (5285015).

21627325 is a wasteful number, since it uses less digits than its factorization.

21627325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056 (or 3051 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 21627325 is about 4650.5187882644. The cubic root of 21627325 is about 278.6127170259.

Adding to 21627325 its reverse (52372612), we get a palindrome (73999937).

It can be divided in two parts, 21627 and 325, that added together give a cube (21952 = 28³).

The spelling of 21627325 in words is "twenty-one million, six hundred twenty-seven thousand, three hundred twenty-five".