25022561 has 4 divisors (see below), whose sum is σ = 25080000. Its totient is φ = 24965124.

The previous prime is 25022533. The next prime is 25022573. The reversal of 25022561 is 16522052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25022561 - 2⁶ = 25022497 is a prime.

It is a super-2 number, since 2×25022561² = 1252257117997442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25022531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28061 + ... + 28938.

It is an arithmetic number, because the mean of its divisors is an integer number (6270000).

Almost surely, 2^25022561 is an apocalyptic number.

It is an amenable number.

25022561 is a deficient number, since it is larger than the sum of its proper divisors (57439).

25022561 is an equidigital number, since it uses as much as digits as its factorization.

25022561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57438.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25022561 is about 5002.2555912308. The cubic root of 25022561 is about 292.4897057278.

The spelling of 25022561 in words is "twenty-five million, twenty-two thousand, five hundred sixty-one".