25622643 has 16 divisors (see below), whose sum is σ = 34675200. Its totient is φ = 16828416.

The previous prime is 25622633. The next prime is 25622657. The reversal of 25622643 is 34622652.

It is not a de Polignac number, because 25622643 - 2⁴ = 25622627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25622643.

It is not an unprimeable number, because it can be changed into a prime (25622603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99571 + ... + 99827.

It is an arithmetic number, because the mean of its divisors is an integer number (2167200).

Almost surely, 2^25622643 is an apocalyptic number.

25622643 is a deficient number, since it is larger than the sum of its proper divisors (9052557).

25622643 is a wasteful number, since it uses less digits than its factorization.

25622643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its digits is 17280, while the sum is 30.

The square root of 25622643 is about 5061.8813696095. The cubic root of 25622643 is about 294.8093875405.

Subtracting 25622643 from its reverse (34622652), we obtain a palindrome (9000009).

The spelling of 25622643 in words is "twenty-five million, six hundred twenty-two thousand, six hundred forty-three".