25155239 has 2 divisors, whose sum is σ = 25155240. Its totient is φ = 25155238.

The previous prime is 25155233. The next prime is 25155287. The reversal of 25155239 is 93255152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25155239 - 2¹⁶ = 25089703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25155233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577619 + 12577620.

It is an arithmetic number, because the mean of its divisors is an integer number (12577620).

Almost surely, 2^25155239 is an apocalyptic number.

25155239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25155239 is an equidigital number, since it uses as much as digits as its factorization.

25155239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 25155239 is about 5015.4998753863. The cubic root of 25155239 is about 293.0057541765.

The spelling of 25155239 in words is "twenty-five million, one hundred fifty-five thousand, two hundred thirty-nine".