25151591 has 2 divisors, whose sum is σ = 25151592. Its totient is φ = 25151590.

The previous prime is 25151587. The next prime is 25151629. The reversal of 25151591 is 19515152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25151591 - 2² = 25151587 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25151531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12575795 + 12575796.

It is an arithmetic number, because the mean of its divisors is an integer number (12575796).

Almost surely, 2^25151591 is an apocalyptic number.

25151591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25151591 is an equidigital number, since it uses as much as digits as its factorization.

25151591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 29.

The square root of 25151591 is about 5015.1361895765. The cubic root of 25151591 is about 292.9915896432.

The spelling of 25151591 in words is "twenty-five million, one hundred fifty-one thousand, five hundred ninety-one".