25509233 has 4 divisors (see below), whose sum is σ = 25538880. Its totient is φ = 25479588.

The previous prime is 25509227. The next prime is 25509287. The reversal of 25509233 is 33290552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25509233 - 2²² = 21314929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25509196 and 25509205.

It is not an unprimeable number, because it can be changed into a prime (25509293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13493 + ... + 15266.

It is an arithmetic number, because the mean of its divisors is an integer number (6384720).

Almost surely, 2^25509233 is an apocalyptic number.

It is an amenable number.

25509233 is a deficient number, since it is larger than the sum of its proper divisors (29647).

25509233 is an equidigital number, since it uses as much as digits as its factorization.

25509233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29646.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 25509233 is about 5050.6665896691. Note that the first 3 decimals coincide. The cubic root of 25509233 is about 294.3737860700.

Adding to 25509233 its reverse (33290552), we get a palindrome (58799785).

The spelling of 25509233 in words is "twenty-five million, five hundred nine thousand, two hundred thirty-three".