25215563 has 2 divisors, whose sum is σ = 25215564. Its totient is φ = 25215562.

The previous prime is 25215557. The next prime is 25215577. The reversal of 25215563 is 36551252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25215563 - 2⁶ = 25215499 is a prime.

It is not a weakly prime, because it can be changed into another prime (25215503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12607781 + 12607782.

It is an arithmetic number, because the mean of its divisors is an integer number (12607782).

Almost surely, 2^25215563 is an apocalyptic number.

25215563 is a deficient number, since it is larger than the sum of its proper divisors (1).

25215563 is an equidigital number, since it uses as much as digits as its factorization.

25215563 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 25215563 is about 5021.5100318530. The cubic root of 25215563 is about 293.2397832133.

The spelling of 25215563 in words is "twenty-five million, two hundred fifteen thousand, five hundred sixty-three".