25491223 has 4 divisors (see below), whose sum is σ = 25506040. Its totient is φ = 25476408.

The previous prime is 25491181. The next prime is 25491227. The reversal of 25491223 is 32219452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25491223 - 2¹⁷ = 25360151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25491191 and 25491200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4428 + ... + 8401.

It is an arithmetic number, because the mean of its divisors is an integer number (6376510).

Almost surely, 2^25491223 is an apocalyptic number.

25491223 is a deficient number, since it is larger than the sum of its proper divisors (14817).

25491223 is a wasteful number, since it uses less digits than its factorization.

25491223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14816.

The product of its digits is 4320, while the sum is 28.

The square root of 25491223 is about 5048.8833418886. The cubic root of 25491223 is about 294.3044919433.

The spelling of 25491223 in words is "twenty-five million, four hundred ninety-one thousand, two hundred twenty-three".