222778606 has 4 divisors (see below), whose sum is σ = 334167912. Its totient is φ = 111389302.

The previous prime is 222778603. The next prime is 222778607. The reversal of 222778606 is 606877222.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222778603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55694650 + ... + 55694653.

It is an arithmetic number, because the mean of its divisors is an integer number (83541978).

Almost surely, 2^222778606 is an apocalyptic number.

222778606 is a deficient number, since it is larger than the sum of its proper divisors (111389306).

222778606 is a wasteful number, since it uses less digits than its factorization.

222778606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111389305.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 222778606 is about 14925.7698628915. The cubic root of 222778606 is about 606.2119511884.

The spelling of 222778606 in words is "two hundred twenty-two million, seven hundred seventy-eight thousand, six hundred six".