25691151 has 4 divisors (see below), whose sum is σ = 34254872. Its totient is φ = 17127432.

The previous prime is 25691147. The next prime is 25691153. The reversal of 25691151 is 15119652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25691151 - 2² = 25691147 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 (25691153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281856 + ... + 4281861.

It is an arithmetic number, because the mean of its divisors is an integer number (8563718).

Almost surely, 2^25691151 is an apocalyptic number.

25691151 is a deficient number, since it is larger than the sum of its proper divisors (8563721).

25691151 is an equidigital number, since it uses as much as digits as its factorization.

25691151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563720.

The product of its digits is 2700, while the sum is 30.

The square root of 25691151 is about 5068.6439014790. The cubic root of 25691151 is about 295.0719005054.

The spelling of 25691151 in words is "twenty-five million, six hundred ninety-one thousand, one hundred fifty-one".