222221957 has 2 divisors, whose sum is σ = 222221958. Its totient is φ = 222221956.

The previous prime is 222221947. The next prime is 222221971. The reversal of 222221957 is 759122222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208686916 + 13535041 = 14446^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221957 - 2¹² = 222217861 is a prime.

It is a Chen prime.

It is equal to p_12238259 and since 222221957 and 12238259 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110978 + 111110979.

It is an arithmetic number, because the mean of its divisors is an integer number (111110979).

Almost surely, 2^222221957 is an apocalyptic number.

It is an amenable number.

222221957 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221957 is an equidigital number, since it uses as much as digits as its factorization.

222221957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 222221957 is about 14907.1109541722. The cubic root of 222221957 is about 605.7066233069.

The spelling of 222221957 in words is "two hundred twenty-two million, two hundred twenty-one thousand, nine hundred fifty-seven".