15222226 has 4 divisors (see below), whose sum is σ = 22833342. Its totient is φ = 7611112.

The previous prime is 15222223. The next prime is 15222227. The reversal of 15222226 is 62222251.

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., 14861025 + 361201 = 3855^2 + 601^2 .

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 = 15222197 and 15222206.

It is not an unprimeable number, because it can be changed into a prime (15222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3805555 + ... + 3805558.

Almost surely, 2^15222226 is an apocalyptic number.

15222226 is a deficient number, since it is larger than the sum of its proper divisors (7611116).

15222226 is an equidigital number, since it uses as much as digits as its factorization.

15222226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611115.

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

The square root of 15222226 is about 3901.5671210425. The cubic root of 15222226 is about 247.8331452225.

Adding to 15222226 its reverse (62222251), we get a palindrome (77444477).

The spelling of 15222226 in words is "fifteen million, two hundred twenty-two thousand, two hundred twenty-six".