25591567 has 2 divisors, whose sum is σ = 25591568. Its totient is φ = 25591566.

The previous prime is 25591561. The next prime is 25591583. The reversal of 25591567 is 76519552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25591567 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25591561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795783 + 12795784.

It is an arithmetic number, because the mean of its divisors is an integer number (12795784).

Almost surely, 2^25591567 is an apocalyptic number.

25591567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25591567 is an equidigital number, since it uses as much as digits as its factorization.

25591567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 40.

The square root of 25591567 is about 5058.8108286434. The cubic root of 25591567 is about 294.6901544229.

The spelling of 25591567 in words is "twenty-five million, five hundred ninety-one thousand, five hundred sixty-seven".