25233251 has 4 divisors (see below), whose sum is σ = 25315752. Its totient is φ = 25150752.

The previous prime is 25233233. The next prime is 25233259. The reversal of 25233251 is 15233252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25233251 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25233259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40790 + ... + 41403.

It is an arithmetic number, because the mean of its divisors is an integer number (6328938).

Almost surely, 2^25233251 is an apocalyptic number.

25233251 is a deficient number, since it is larger than the sum of its proper divisors (82501).

25233251 is an equidigital number, since it uses as much as digits as its factorization.

25233251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82500.

The product of its digits is 1800, while the sum is 23.

The square root of 25233251 is about 5023.2709463058. The cubic root of 25233251 is about 293.3083336419.

Subtracting from 25233251 its reverse (15233252), we obtain a palindrome (9999999).

The spelling of 25233251 in words is "twenty-five million, two hundred thirty-three thousand, two hundred fifty-one".