22813229 has 2 divisors, whose sum is σ = 22813230. Its totient is φ = 22813228.

The previous prime is 22813213. The next prime is 22813237. The reversal of 22813229 is 92231822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 9012004 = 3715^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 22813229 - 2⁴ = 22813213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22813279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11406614 + 11406615.

It is an arithmetic number, because the mean of its divisors is an integer number (11406615).

Almost surely, 2^22813229 is an apocalyptic number.

It is an amenable number.

22813229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22813229 is an equidigital number, since it uses as much as digits as its factorization.

22813229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 22813229 is about 4776.3196082339. The cubic root of 22813229 is about 283.6148195258.

The spelling of 22813229 in words is "twenty-two million, eight hundred thirteen thousand, two hundred twenty-nine".