25615523 has 2 divisors, whose sum is σ = 25615524. Its totient is φ = 25615522.

The previous prime is 25615501. The next prime is 25615559. The reversal of 25615523 is 32551652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25615523 - 2¹² = 25611427 is a prime.

It is not a weakly prime, because it can be changed into another prime (25615223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12807761 + 12807762.

It is an arithmetic number, because the mean of its divisors is an integer number (12807762).

Almost surely, 2^25615523 is an apocalyptic number.

25615523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25615523 is an equidigital number, since it uses as much as digits as its factorization.

25615523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 25615523 is about 5061.1780249266. The cubic root of 25615523 is about 294.7820778767.

The spelling of 25615523 in words is "twenty-five million, six hundred fifteen thousand, five hundred twenty-three".