222161726 has 4 divisors (see below), whose sum is σ = 333242592. Its totient is φ = 111080862.

The previous prime is 222161677. The next prime is 222161759. The reversal of 222161726 is 627161222.

It is a happy number.

222161726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 627161222 = 2 ⋅313580611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55540430 + ... + 55540433.

It is an arithmetic number, because the mean of its divisors is an integer number (83310648).

Almost surely, 2^222161726 is an apocalyptic number.

222161726 is a deficient number, since it is larger than the sum of its proper divisors (111080866).

222161726 is a wasteful number, since it uses less digits than its factorization.

222161726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111080865.

The product of its digits is 4032, while the sum is 29.

The square root of 222161726 is about 14905.0906069034. The cubic root of 222161726 is about 605.6518948233.

The spelling of 222161726 in words is "two hundred twenty-two million, one hundred sixty-one thousand, seven hundred twenty-six".