25551422 has 16 divisors (see below), whose sum is σ = 41400240. Its totient is φ = 11757312.

The previous prime is 25551389. The next prime is 25551431. The reversal of 25551422 is 22415552.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 25551391 and 25551400.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8558 + ... + 11150.

It is an arithmetic number, because the mean of its divisors is an integer number (2587515).

Almost surely, 2^25551422 is an apocalyptic number.

25551422 is a deficient number, since it is larger than the sum of its proper divisors (15848818).

25551422 is a wasteful number, since it uses less digits than its factorization.

25551422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987.

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

The square root of 25551422 is about 5054.8414416280. The cubic root of 25551422 is about 294.5359821826.

Adding to 25551422 its reverse (22415552), we get a palindrome (47966974).

The spelling of 25551422 in words is "twenty-five million, five hundred fifty-one thousand, four hundred twenty-two".