222221801 has 2 divisors, whose sum is σ = 222221802. Its totient is φ = 222221800.

The previous prime is 222221771. The next prime is 222221819. The reversal of 222221801 is 108122222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196981225 + 25240576 = 14035^2 + 5024^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221801 - 2⁶ = 222221737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222221821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110900 + 111110901.

It is an arithmetic number, because the mean of its divisors is an integer number (111110901).

Almost surely, 2^222221801 is an apocalyptic number.

It is an amenable number.

222221801 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221801 is an equidigital number, since it uses as much as digits as its factorization.

222221801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 222221801 is about 14907.1057217691. The cubic root of 222221801 is about 605.7064815714.

The spelling of 222221801 in words is "two hundred twenty-two million, two hundred twenty-one thousand, eight hundred one".