22273906 has 24 divisors (see below), whose sum is σ = 35272692. Its totient is φ = 10540800.

The previous prime is 22273897. The next prime is 22273973. The reversal of 22273906 is 60937222.

It can be written as a sum of positive squares in 6 ways, for example, as 99225 + 22174681 = 315^2 + 4709^2 .

It is a super-2 number, since 2×22273906² = 992253776993672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305086 + ... + 305158.

Almost surely, 2^22273906 is an apocalyptic number.

22273906 is a deficient number, since it is larger than the sum of its proper divisors (12998786).

22273906 is an equidigital number, since it uses as much as digits as its factorization.

22273906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 22273906 is about 4719.5239166679. The cubic root of 22273906 is about 281.3620119433.

The spelling of 22273906 in words is "twenty-two million, two hundred seventy-three thousand, nine hundred six".