25731223 has 6 divisors (see below), whose sum is σ = 29932296. Its totient is φ = 22055292.

The previous prime is 25731197. The next prime is 25731247. The reversal of 25731223 is 32213752.

It is not a de Polignac number, because 25731223 - 2⁵ = 25731191 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 (25735223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262515 + ... + 262612.

It is an arithmetic number, because the mean of its divisors is an integer number (4988716).

Almost surely, 2^25731223 is an apocalyptic number.

25731223 is a deficient number, since it is larger than the sum of its proper divisors (4201073).

25731223 is an equidigital number, since it uses as much as digits as its factorization.

25731223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525141 (or 525134 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 25731223 is about 5072.5952923528. The cubic root of 25731223 is about 295.2252344806.

Adding to 25731223 its reverse (32213752), we get a palindrome (57944975).

The spelling of 25731223 in words is "twenty-five million, seven hundred thirty-one thousand, two hundred twenty-three".