25551607 has 2 divisors, whose sum is σ = 25551608. Its totient is φ = 25551606.

The previous prime is 25551587. The next prime is 25551613. The reversal of 25551607 is 70615552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25551607 - 2¹⁵ = 25518839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25551667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775803 + 12775804.

It is an arithmetic number, because the mean of its divisors is an integer number (12775804).

Almost surely, 2^25551607 is an apocalyptic number.

25551607 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551607 is an equidigital number, since it uses as much as digits as its factorization.

25551607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 25551607 is about 5054.8597408830. The cubic root of 25551607 is about 294.5366930240.

The spelling of 25551607 in words is "twenty-five million, five hundred fifty-one thousand, six hundred seven".