22981306 has 4 divisors (see below), whose sum is σ = 34471962. Its totient is φ = 11490652.

The previous prime is 22981303. The next prime is 22981327. The reversal of 22981306 is 60318922.

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., 17986081 + 4995225 = 4241^2 + 2235^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22981303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5745325 + ... + 5745328.

Almost surely, 2^22981306 is an apocalyptic number.

22981306 is a deficient number, since it is larger than the sum of its proper divisors (11490656).

22981306 is a wasteful number, since it uses less digits than its factorization.

22981306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11490655.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22981306 is about 4793.8821428984. The cubic root of 22981306 is about 284.3096289138.

The spelling of 22981306 in words is "twenty-two million, nine hundred eighty-one thousand, three hundred six".