25205251 has 8 divisors (see below), whose sum is σ = 26057360. Its totient is φ = 24362208.

The previous prime is 25205239. The next prime is 25205281. The reversal of 25205251 is 15250252.

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-25205251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25205281) 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, 3640 + ... + 7978.

It is an arithmetic number, because the mean of its divisors is an integer number (3257170).

Almost surely, 2^25205251 is an apocalyptic number.

25205251 is a deficient number, since it is larger than the sum of its proper divisors (852109).

25205251 is a wasteful number, since it uses less digits than its factorization.

25205251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 25205251 is about 5020.4831440809. The cubic root of 25205251 is about 293.1998039229.

The spelling of 25205251 in words is "twenty-five million, two hundred five thousand, two hundred fifty-one".