25724223 has 42 divisors (see below), whose sum is σ = 44708072. Its totient is φ = 14492520.

The previous prime is 25724197. The next prime is 25724227. The reversal of 25724223 is 32242752.

It is not a de Polignac number, because 25724223 - 2¹² = 25720127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25724227) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 362278 + ... + 362348.

Almost surely, 2^25724223 is an apocalyptic number.

25724223 is a deficient number, since it is larger than the sum of its proper divisors (18983849).

25724223 is an frugal number, since it uses more digits than its factorization.

25724223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 81 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 25724223 is about 5071.9052633108. The cubic root of 25724223 is about 295.1984607296.

Adding to 25724223 its reverse (32242752), we get a palindrome (57966975).

The spelling of 25724223 in words is "twenty-five million, seven hundred twenty-four thousand, two hundred twenty-three".