25191223 has 2 divisors, whose sum is σ = 25191224. Its totient is φ = 25191222.

The previous prime is 25191209. The next prime is 25191239. The reversal of 25191223 is 32219152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25191223 - 2¹³ = 25183031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25191253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12595611 + 12595612.

It is an arithmetic number, because the mean of its divisors is an integer number (12595612).

Almost surely, 2^25191223 is an apocalyptic number.

25191223 is a deficient number, since it is larger than the sum of its proper divisors (1).

25191223 is an equidigital number, since it uses as much as digits as its factorization.

25191223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 25191223 is about 5019.0858729454. The cubic root of 25191223 is about 293.1454003105.

The spelling of 25191223 in words is "twenty-five million, one hundred ninety-one thousand, two hundred twenty-three".