25422551 has 16 divisors (see below), whose sum is σ = 33365760. Its totient is φ = 18766080.

The previous prime is 25422541. The next prime is 25422557. The reversal of 25422551 is 15522452.

It is a cyclic number.

It is not a de Polignac number, because 25422551 - 2⁶ = 25422487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25422551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25422557) 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, 7226 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (2085360).

Almost surely, 2^25422551 is an apocalyptic number.

25422551 is a deficient number, since it is larger than the sum of its proper divisors (7943209).

25422551 is a wasteful number, since it uses less digits than its factorization.

25422551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17414.

The product of its digits is 4000, while the sum is 26.

The square root of 25422551 is about 5042.0780438228. The cubic root of 25422551 is about 294.0399740485.

Subtracting from 25422551 its reverse (15522452), we obtain a palindrome (9900099).

The spelling of 25422551 in words is "twenty-five million, four hundred twenty-two thousand, five hundred fifty-one".