25551251 has 8 divisors (see below), whose sum is σ = 27993600. Its totient is φ = 23128840.

The previous prime is 25551217. The next prime is 25551263. The reversal of 25551251 is 15215552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25551251 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 25551251.

It is not an unprimeable number, because it can be changed into a prime (25551271) 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, 2231 + ... + 7488.

It is an arithmetic number, because the mean of its divisors is an integer number (3499200).

Almost surely, 2^25551251 is an apocalyptic number.

25551251 is a deficient number, since it is larger than the sum of its proper divisors (2442349).

25551251 is a wasteful number, since it uses less digits than its factorization.

25551251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969.

The product of its digits is 2500, while the sum is 26.

The square root of 25551251 is about 5054.8245271226. The cubic root of 25551251 is about 294.5353251315.

The spelling of 25551251 in words is "twenty-five million, five hundred fifty-one thousand, two hundred fifty-one".