222638197 has 4 divisors (see below), whose sum is σ = 222898240. Its totient is φ = 222378156.

The previous prime is 222638189. The next prime is 222638203. The reversal of 222638197 is 791836222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222638197 - 2³ = 222638189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222638167) 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 in 3 ways as a sum of consecutive naturals, for example, 128733 + ... + 130450.

It is an arithmetic number, because the mean of its divisors is an integer number (55724560).

Almost surely, 2^222638197 is an apocalyptic number.

It is an amenable number.

222638197 is a deficient number, since it is larger than the sum of its proper divisors (260043).

222638197 is an equidigital number, since it uses as much as digits as its factorization.

222638197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260042.

The product of its digits is 72576, while the sum is 40.

The square root of 222638197 is about 14921.0655450608. The cubic root of 222638197 is about 606.0845668706.

The spelling of 222638197 in words is "two hundred twenty-two million, six hundred thirty-eight thousand, one hundred ninety-seven".