25231222 has 4 divisors (see below), whose sum is σ = 37846836. Its totient is φ = 12615610.

The previous prime is 25231201. The next prime is 25231223. The reversal of 25231222 is 22213252.

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

It is a super-2 number, since 2×25231222² = 1273229127226568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25231222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307804 + ... + 6307807.

It is an arithmetic number, because the mean of its divisors is an integer number (9461709).

Almost surely, 2^25231222 is an apocalyptic number.

25231222 is a deficient number, since it is larger than the sum of its proper divisors (12615614).

25231222 is a wasteful number, since it uses less digits than its factorization.

25231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12615613.

The product of its digits is 480, while the sum is 19.

The square root of 25231222 is about 5023.0689822060. The cubic root of 25231222 is about 293.3004718123.

Adding to 25231222 its reverse (22213252), we get a palindrome (47444474).

The spelling of 25231222 in words is "twenty-five million, two hundred thirty-one thousand, two hundred twenty-two".