25327991 has 24 divisors (see below), whose sum is σ = 29729280. Its totient is φ = 21422016.

The previous prime is 25327987. The next prime is 25327999. The reversal of 25327991 is 19972352.

It is not a de Polignac number, because 25327991 - 2² = 25327987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25327999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199370 + ... + 199496.

It is an arithmetic number, because the mean of its divisors is an integer number (1238720).

Almost surely, 2^25327991 is an apocalyptic number.

25327991 is a deficient number, since it is larger than the sum of its proper divisors (4401289).

25327991 is a wasteful number, since it uses less digits than its factorization.

25327991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 192 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 25327991 is about 5032.6922218630. The cubic root of 25327991 is about 293.6749573814.

The spelling of 25327991 in words is "twenty-five million, three hundred twenty-seven thousand, nine hundred ninety-one".