222191393 has 2 divisors, whose sum is σ = 222191394. Its totient is φ = 222191392.

The previous prime is 222191381. The next prime is 222191407. The reversal of 222191393 is 393191222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199600384 + 22591009 = 14128^2 + 4753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222191393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_12236639 and since 222191393 and 12236639 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (222191303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111095696 + 111095697.

It is an arithmetic number, because the mean of its divisors is an integer number (111095697).

Almost surely, 2^222191393 is an apocalyptic number.

It is an amenable number.

222191393 is a deficient number, since it is larger than the sum of its proper divisors (1).

222191393 is an equidigital number, since it uses as much as digits as its factorization.

222191393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 222191393 is about 14906.0857705838. The cubic root of 222191393 is about 605.6788527747.

The spelling of 222191393 in words is "two hundred twenty-two million, one hundred ninety-one thousand, three hundred ninety-three".