222421289 has 2 divisors, whose sum is σ = 222421290. Its totient is φ = 222421288.

The previous prime is 222421237. The next prime is 222421301. The reversal of 222421289 is 982124222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127690000 + 94731289 = 11300^2 + 9733^2 .

It is a cyclic number.

It is not a de Polignac number, because 222421289 - 2¹² = 222417193 is a prime.

It is not a weakly prime, because it can be changed into another prime (222421889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111210644 + 111210645.

It is an arithmetic number, because the mean of its divisors is an integer number (111210645).

Almost surely, 2^222421289 is an apocalyptic number.

It is an amenable number.

222421289 is a deficient number, since it is larger than the sum of its proper divisors (1).

222421289 is an equidigital number, since it uses as much as digits as its factorization.

222421289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 222421289 is about 14913.7952580824. The cubic root of 222421289 is about 605.8876744688.

The spelling of 222421289 in words is "two hundred twenty-two million, four hundred twenty-one thousand, two hundred eighty-nine".