25535891 has 2 divisors, whose sum is σ = 25535892. Its totient is φ = 25535890.

The previous prime is 25535869. The next prime is 25535927. The reversal of 25535891 is 19853552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25535891 - 2⁶ = 25535827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25535821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12767945 + 12767946.

It is an arithmetic number, because the mean of its divisors is an integer number (12767946).

Almost surely, 2^25535891 is an apocalyptic number.

25535891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25535891 is an equidigital number, since it uses as much as digits as its factorization.

25535891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 38.

The square root of 25535891 is about 5053.3049581437. The cubic root of 25535891 is about 294.4762938479.

The spelling of 25535891 in words is "twenty-five million, five hundred thirty-five thousand, eight hundred ninety-one".