25351891 has 2 divisors, whose sum is σ = 25351892. Its totient is φ = 25351890.

The previous prime is 25351877. The next prime is 25351933. The reversal of 25351891 is 19815352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25351891 - 2¹¹ = 25349843 is a prime.

It is not a weakly prime, because it can be changed into another prime (25351091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675945 + 12675946.

It is an arithmetic number, because the mean of its divisors is an integer number (12675946).

Almost surely, 2^25351891 is an apocalyptic number.

25351891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25351891 is an equidigital number, since it uses as much as digits as its factorization.

25351891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 25351891 is about 5035.0661366064. The cubic root of 25351891 is about 293.7673008672.

The spelling of 25351891 in words is "twenty-five million, three hundred fifty-one thousand, eight hundred ninety-one".