25511567 has 2 divisors, whose sum is σ = 25511568. Its totient is φ = 25511566.

The previous prime is 25511539. The next prime is 25511569. The reversal of 25511567 is 76511552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25511567 - 2²⁴ = 8734351 is a prime.

Together with 25511569, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25511569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755783 + 12755784.

It is an arithmetic number, because the mean of its divisors is an integer number (12755784).

Almost surely, 2^25511567 is an apocalyptic number.

25511567 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511567 is an equidigital number, since it uses as much as digits as its factorization.

25511567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 25511567 is about 5050.8976429938. The cubic root of 25511567 is about 294.3827638319.

The spelling of 25511567 in words is "twenty-five million, five hundred eleven thousand, five hundred sixty-seven".