222774421 has 2 divisors, whose sum is σ = 222774422. Its totient is φ = 222774420.

The previous prime is 222774367. The next prime is 222774427. The reversal of 222774421 is 124477222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143760100 + 79014321 = 11990^2 + 8889^2 .

It is a cyclic number.

It is not a de Polignac number, because 222774421 - 2¹⁵ = 222741653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222774427) 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 as a sum of consecutive naturals, namely, 111387210 + 111387211.

It is an arithmetic number, because the mean of its divisors is an integer number (111387211).

Almost surely, 2^222774421 is an apocalyptic number.

It is an amenable number.

222774421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222774421 is an equidigital number, since it uses as much as digits as its factorization.

222774421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 31.

The square root of 222774421 is about 14925.6296684596. The cubic root of 222774421 is about 606.2081551733.

The spelling of 222774421 in words is "two hundred twenty-two million, seven hundred seventy-four thousand, four hundred twenty-one".