222456397 has 2 divisors, whose sum is σ = 222456398. Its totient is φ = 222456396.

The previous prime is 222456359. The next prime is 222456463. The reversal of 222456397 is 793654222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146748996 + 75707401 = 12114^2 + 8701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222456397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222456197) 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, 111228198 + 111228199.

It is an arithmetic number, because the mean of its divisors is an integer number (111228199).

Almost surely, 2^222456397 is an apocalyptic number.

It is an amenable number.

222456397 is a deficient number, since it is larger than the sum of its proper divisors (1).

222456397 is an equidigital number, since it uses as much as digits as its factorization.

222456397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 222456397 is about 14914.9722426829. The cubic root of 222456397 is about 605.9195514914.

The spelling of 222456397 in words is "two hundred twenty-two million, four hundred fifty-six thousand, three hundred ninety-seven".