222915766 has 4 divisors (see below), whose sum is σ = 334373652. Its totient is φ = 111457882.

The previous prime is 222915743. The next prime is 222915769. The reversal of 222915766 is 667519222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 667519222 = 2 ⋅333759611.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222915769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55728940 + ... + 55728943.

It is an arithmetic number, because the mean of its divisors is an integer number (83593413).

Almost surely, 2^222915766 is an apocalyptic number.

222915766 is a deficient number, since it is larger than the sum of its proper divisors (111457886).

222915766 is a wasteful number, since it uses less digits than its factorization.

222915766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111457885.

The product of its digits is 90720, while the sum is 40.

The square root of 222915766 is about 14930.3638937569. The cubic root of 222915766 is about 606.3363362216.

The spelling of 222915766 in words is "two hundred twenty-two million, nine hundred fifteen thousand, seven hundred sixty-six".