22981229 has 4 divisors (see below), whose sum is σ = 24333084. Its totient is φ = 21629376.

The previous prime is 22981213. The next prime is 22981243. The reversal of 22981229 is 92218922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6901129 + 16080100 = 2627^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 22981229 - 2⁴ = 22981213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22981249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675902 + ... + 675935.

It is an arithmetic number, because the mean of its divisors is an integer number (6083271).

Almost surely, 2^22981229 is an apocalyptic number.

It is an amenable number.

22981229 is a deficient number, since it is larger than the sum of its proper divisors (1351855).

22981229 is a wasteful number, since it uses less digits than its factorization.

22981229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351854.

The product of its digits is 10368, while the sum is 35.

The square root of 22981229 is about 4793.8741118223. The cubic root of 22981229 is about 284.3093113823.

The spelling of 22981229 in words is "twenty-two million, nine hundred eighty-one thousand, two hundred twenty-nine".