222161689 has 4 divisors (see below), whose sum is σ = 223214800. Its totient is φ = 221108580.

The previous prime is 222161677. The next prime is 222161759. The reversal of 222161689 is 986161222.

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 222161689 - 2⁷ = 222161561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222161089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526239 + ... + 526660.

It is an arithmetic number, because the mean of its divisors is an integer number (55803700).

Almost surely, 2^222161689 is an apocalyptic number.

It is an amenable number.

222161689 is a deficient number, since it is larger than the sum of its proper divisors (1053111).

222161689 is a wasteful number, since it uses less digits than its factorization.

222161689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053110.

The product of its digits is 20736, while the sum is 37.

The square root of 222161689 is about 14905.0893657167. The cubic root of 222161689 is about 605.6518612005.

The spelling of 222161689 in words is "two hundred twenty-two million, one hundred sixty-one thousand, six hundred eighty-nine".