15722226 has 24 divisors (see below), whose sum is σ = 36685740. Its totient is φ = 4837536.

The previous prime is 15722221. The next prime is 15722233. The reversal of 15722226 is 62222751.

It can be written as a sum of positive squares in 2 ways, for example, as 15563025 + 159201 = 3945^2 + 399^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15722226.

It is not an unprimeable number, because it can be changed into a prime (15722221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33361 + ... + 33828.

Almost surely, 2^15722226 is an apocalyptic number.

15722226 is an abundant number, since it is smaller than the sum of its proper divisors (20963514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15722226 is a wasteful number, since it uses less digits than its factorization.

15722226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67210 (or 67207 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 15722226 is about 3965.1262274989. The cubic root of 15722226 is about 250.5174668399.

Adding to 15722226 its reverse (62222751), we get a palindrome (77944977).

The spelling of 15722226 in words is "fifteen million, seven hundred twenty-two thousand, two hundred twenty-six".