25216091 has 2 divisors, whose sum is σ = 25216092. Its totient is φ = 25216090.

The previous prime is 25216067. The next prime is 25216127. The reversal of 25216091 is 19061252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25216091 - 2¹⁰ = 25215067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25216091.

It is not a weakly prime, because it can be changed into another prime (25216001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608045 + 12608046.

It is an arithmetic number, because the mean of its divisors is an integer number (12608046).

Almost surely, 2^25216091 is an apocalyptic number.

25216091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216091 is an equidigital number, since it uses as much as digits as its factorization.

25216091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 25216091 is about 5021.5626054048. The cubic root of 25216091 is about 293.2418299589.

The spelling of 25216091 in words is "twenty-five million, two hundred sixteen thousand, ninety-one".