25229899 has 2 divisors, whose sum is σ = 25229900. Its totient is φ = 25229898.

The previous prime is 25229881. The next prime is 25229909. The reversal of 25229899 is 99892252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25229899 - 2¹⁵ = 25197131 is a prime.

It is not a weakly prime, because it can be changed into another prime (25229839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12614949 + 12614950.

It is an arithmetic number, because the mean of its divisors is an integer number (12614950).

Almost surely, 2^25229899 is an apocalyptic number.

25229899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25229899 is an equidigital number, since it uses as much as digits as its factorization.

25229899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 25229899 is about 5022.9372880815. The cubic root of 25229899 is about 293.2953453159.

It can be divided in two parts, 2522 and 9899, that added together give a palindrome (12421).

The spelling of 25229899 in words is "twenty-five million, two hundred twenty-nine thousand, eight hundred ninety-nine".