25532399 has 2 divisors, whose sum is σ = 25532400. Its totient is φ = 25532398.

The previous prime is 25532393. The next prime is 25532401. The reversal of 25532399 is 99323552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25532399 is a prime.

Together with 25532401, 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 (25532393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766199 + 12766200.

It is an arithmetic number, because the mean of its divisors is an integer number (12766200).

Almost surely, 2^25532399 is an apocalyptic number.

25532399 is a deficient number, since it is larger than the sum of its proper divisors (1).

25532399 is an equidigital number, since it uses as much as digits as its factorization.

25532399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 38.

The square root of 25532399 is about 5052.9594298787. The cubic root of 25532399 is about 294.4628701521.

The spelling of 25532399 in words is "twenty-five million, five hundred thirty-two thousand, three hundred ninety-nine".