22776229 has 8 divisors (see below), whose sum is σ = 26561600. Its totient is φ = 19522188.

The previous prime is 22776217. The next prime is 22776239. The reversal of 22776229 is 92267722.

It is not a de Polignac number, because 22776229 - 2⁷ = 22776101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22776239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32859 + ... + 33544.

It is an arithmetic number, because the mean of its divisors is an integer number (3320200).

Almost surely, 2^22776229 is an apocalyptic number.

It is an amenable number.

22776229 is a deficient number, since it is larger than the sum of its proper divisors (3785371).

22776229 is an frugal number, since it uses more digits than its factorization.

22776229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66424 (or 66410 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 22776229 is about 4772.4447613356. Note that the first 3 decimals coincide. The cubic root of 22776229 is about 283.4614081493.

It can be divided in two parts, 22776 and 229, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22776229 in words is "twenty-two million, seven hundred seventy-six thousand, two hundred twenty-nine".