25533251 has 2 divisors, whose sum is σ = 25533252. Its totient is φ = 25533250.

The previous prime is 25533241. The next prime is 25533257. The reversal of 25533251 is 15233552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25533251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25533251.

It is not a weakly prime, because it can be changed into another prime (25533257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766625 + 12766626.

It is an arithmetic number, because the mean of its divisors is an integer number (12766626).

Almost surely, 2^25533251 is an apocalyptic number.

25533251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25533251 is an equidigital number, since it uses as much as digits as its factorization.

25533251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 26.

The square root of 25533251 is about 5053.0437362049. The cubic root of 25533251 is about 294.4661454623.

The spelling of 25533251 in words is "twenty-five million, five hundred thirty-three thousand, two hundred fifty-one".