20222249 has 2 divisors, whose sum is σ = 20222250. Its totient is φ = 20222248.

The previous prime is 20222243. The next prime is 20222287. The reversal of 20222249 is 94222202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 5438224 = 3845^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222249 - 2⁴ = 20222233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20222243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111124 + 10111125.

It is an arithmetic number, because the mean of its divisors is an integer number (10111125).

Almost surely, 2^20222249 is an apocalyptic number.

It is an amenable number.

20222249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222249 is an equidigital number, since it uses as much as digits as its factorization.

20222249 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 20222249 is about 4496.9154984278. The cubic root of 20222249 is about 272.4435211064.

The spelling of 20222249 in words is "twenty million, two hundred twenty-two thousand, two hundred forty-nine".