25255551 has 8 divisors (see below), whose sum is σ = 33715584. Its totient is φ = 16816280.

The previous prime is 25255547. The next prime is 25255553. The reversal of 25255551 is 15555252.

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

It is a cyclic number.

It is not a de Polignac number, because 25255551 - 2² = 25255547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255553) 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, 2085 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (4214448).

Almost surely, 2^25255551 is an apocalyptic number.

25255551 is a deficient number, since it is larger than the sum of its proper divisors (8460033).

25255551 is an equidigital number, since it uses as much as digits as its factorization.

25255551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10381.

The product of its digits is 12500, while the sum is 30.

The square root of 25255551 is about 5025.4901253510. The cubic root of 25255551 is about 293.3947123910.

The spelling of 25255551 in words is "twenty-five million, two hundred fifty-five thousand, five hundred fifty-one".