21560325 has 24 divisors (see below), whose sum is σ = 35786400. Its totient is φ = 11453760.

The previous prime is 21560323. The next prime is 21560327. The reversal of 21560325 is 52306512.

It is an interprime number because it is at equal distance from previous prime (21560323) and next prime (21560327).

It is not a de Polignac number, because 21560325 - 2¹ = 21560323 is a prime.

It is a super-2 number, since 2×21560325² = 929695228211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21560295 and 21560304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21560321) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28806 + ... + 29544.

It is an arithmetic number, because the mean of its divisors is an integer number (1491100).

Almost surely, 2^21560325 is an apocalyptic number.

21560325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21560325 is a deficient number, since it is larger than the sum of its proper divisors (14226075).

21560325 is a wasteful number, since it uses less digits than its factorization.

21560325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 21560325 is about 4643.3097032182. The cubic root of 21560325 is about 278.3247115867.

Adding to 21560325 its reverse (52306512), we get a palindrome (73866837).

The spelling of 21560325 in words is "twenty-one million, five hundred sixty thousand, three hundred twenty-five".