25561233 has 12 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 16974456.

The previous prime is 25561231. The next prime is 25561241. The reversal of 25561233 is 33216552.

It is not a de Polignac number, because 25561233 - 2¹ = 25561231 is a prime.

It is a super-3 number, since 3×25561233³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25561197 and 25561206.

It is not an unprimeable number, because it can be changed into a prime (25561231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3033 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (3088800).

Almost surely, 2^25561233 is an apocalyptic number.

It is an amenable number.

25561233 is a deficient number, since it is larger than the sum of its proper divisors (11504367).

25561233 is a wasteful number, since it uses less digits than its factorization.

25561233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068 (or 11065 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 25561233 is about 5055.8118042506. The cubic root of 25561233 is about 294.5736750978.

Adding to 25561233 its reverse (33216552), we get a palindrome (58777785).

The spelling of 25561233 in words is "twenty-five million, five hundred sixty-one thousand, two hundred thirty-three".