25533239 has 2 divisors, whose sum is σ = 25533240. Its totient is φ = 25533238.

The previous prime is 25533163. The next prime is 25533241. The reversal of 25533239 is 93233552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25533239 - 2¹⁶ = 25467703 is a prime.

It is a super-2 number, since 2×25533239² = 1303892587662242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 25533241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25533259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766619 + 12766620.

It is an arithmetic number, because the mean of its divisors is an integer number (12766620).

Almost surely, 2^25533239 is an apocalyptic number.

25533239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25533239 is an equidigital number, since it uses as much as digits as its factorization.

25533239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 32.

The square root of 25533239 is about 5053.0425488017. The cubic root of 25533239 is about 294.4660993316.

The spelling of 25533239 in words is "twenty-five million, five hundred thirty-three thousand, two hundred thirty-nine".