25309223 has 6 divisors (see below), whose sum is σ = 26434824. Its totient is φ = 24185744.

The previous prime is 25309211. The next prime is 25309231. The reversal of 25309223 is 32290352.

It is not a de Polignac number, because 25309223 - 2²⁰ = 24260647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25309192 and 25309201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25309723) 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, 23603 + ... + 24651.

It is an arithmetic number, because the mean of its divisors is an integer number (4405804).

Almost surely, 2^25309223 is an apocalyptic number.

25309223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25309223 is a deficient number, since it is larger than the sum of its proper divisors (1125601).

25309223 is an frugal number, since it uses more digits than its factorization.

25309223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 25309223 is about 5030.8272679550. The cubic root of 25309223 is about 293.6024019026.

Adding to 25309223 its reverse (32290352), we get a palindrome (57599575).

The spelling of 25309223 in words is "twenty-five million, three hundred nine thousand, two hundred twenty-three".