25221226 has 4 divisors (see below), whose sum is σ = 37831842. Its totient is φ = 12610612.

The previous prime is 25221223. The next prime is 25221239. The reversal of 25221226 is 62212252.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 24000201 + 1221025 = 4899^2 + 1105^2 .

It is a super-2 number, since 2×25221226² = 1272220481886152, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 25221197 and 25221206.

It is not an unprimeable number, because it can be changed into a prime (25221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6305305 + ... + 6305308.

Almost surely, 2^25221226 is an apocalyptic number.

25221226 is a deficient number, since it is larger than the sum of its proper divisors (12610616).

25221226 is a wasteful number, since it uses less digits than its factorization.

25221226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610615.

The product of its digits is 960, while the sum is 22.

The square root of 25221226 is about 5022.0738744069. The cubic root of 25221226 is about 293.2617338448.

Adding to 25221226 its reverse (62212252), we get a palindrome (87433478).

The spelling of 25221226 in words is "twenty-five million, two hundred twenty-one thousand, two hundred twenty-six".