25155191 has 2 divisors, whose sum is σ = 25155192. Its totient is φ = 25155190.

The previous prime is 25155157. The next prime is 25155197. The reversal of 25155191 is 19155152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25155191 - 2¹⁴ = 25138807 is a prime.

It is equal to p_1575029 and since 25155191 and 1575029 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25155197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577595 + 12577596.

It is an arithmetic number, because the mean of its divisors is an integer number (12577596).

Almost surely, 2^25155191 is an apocalyptic number.

25155191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25155191 is an equidigital number, since it uses as much as digits as its factorization.

25155191 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25155191 is about 5015.4950902179. The cubic root of 25155191 is about 293.0055678100.

The spelling of 25155191 in words is "twenty-five million, one hundred fifty-five thousand, one hundred ninety-one".