25556507 has 2 divisors, whose sum is σ = 25556508. Its totient is φ = 25556506.

The previous prime is 25556459. The next prime is 25556513. The reversal of 25556507 is 70565552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25556507 - 2¹⁰ = 25555483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25556527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778253 + 12778254.

It is an arithmetic number, because the mean of its divisors is an integer number (12778254).

Almost surely, 2^25556507 is an apocalyptic number.

25556507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25556507 is an equidigital number, since it uses as much as digits as its factorization.

25556507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52500, while the sum is 35.

The square root of 25556507 is about 5055.3443997417. The cubic root of 25556507 is about 294.5555194661. Note that the first 4 decimals are identical.

The spelling of 25556507 in words is "twenty-five million, five hundred fifty-six thousand, five hundred seven".