25551138 has 16 divisors (see below), whose sum is σ = 51270336. Its totient is φ = 8489040.

The previous prime is 25551109. The next prime is 25551139. The reversal of 25551138 is 83115552.

It is not an unprimeable number, because it can be changed into a prime (25551139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4981 + ... + 8712.

It is an arithmetic number, because the mean of its divisors is an integer number (3204396).

Almost surely, 2^25551138 is an apocalyptic number.

25551138 is an abundant number, since it is smaller than the sum of its proper divisors (25719198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25551138 is a wasteful number, since it uses less digits than its factorization.

25551138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14009.

The product of its digits is 6000, while the sum is 30.

The square root of 25551138 is about 5054.8133496698. The cubic root of 25551138 is about 294.5348909383.

The spelling of 25551138 in words is "twenty-five million, five hundred fifty-one thousand, one hundred thirty-eight".