20224229 has 2 divisors, whose sum is σ = 20224230. Its totient is φ = 20224228.

The previous prime is 20224207. The next prime is 20224247. The reversal of 20224229 is 92242202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19228225 + 996004 = 4385^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224229 - 2¹² = 20220133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112114 + 10112115.

It is an arithmetic number, because the mean of its divisors is an integer number (10112115).

Almost surely, 2^20224229 is an apocalyptic number.

It is an amenable number.

20224229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224229 is an equidigital number, since it uses as much as digits as its factorization.

20224229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20224229 is about 4497.1356439405. The cubic root of 20224229 is about 272.4524126424.

The spelling of 20224229 in words is "twenty million, two hundred twenty-four thousand, two hundred twenty-nine".