22770229 has 2 divisors, whose sum is σ = 22770230. Its totient is φ = 22770228.

The previous prime is 22770203. The next prime is 22770239. The reversal of 22770229 is 92207722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14516100 + 8254129 = 3810^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 22770229 - 2⁷ = 22770101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22770229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22770239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385114 + 11385115.

It is an arithmetic number, because the mean of its divisors is an integer number (11385115).

Almost surely, 2^22770229 is an apocalyptic number.

It is an amenable number.

22770229 is a deficient number, since it is larger than the sum of its proper divisors (1).

22770229 is an equidigital number, since it uses as much as digits as its factorization.

22770229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 22770229 is about 4771.8161112935. The cubic root of 22770229 is about 283.4365149764.

The spelling of 22770229 in words is "twenty-two million, seven hundred seventy thousand, two hundred twenty-nine".