231776782118222 has 16 divisors (see below), whose sum is σ = 379271372457600. Its totient is φ = 105353006546040.

The previous prime is 231776782118209. The next prime is 231776782118257. The reversal of 231776782118222 is 222811287677132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36985679 + ... + 42795957.

It is an arithmetic number, because the mean of its divisors is an integer number (23704460778600).

Almost surely, 2^{231776782118222} is an apocalyptic number.

231776782118222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231776782118222 is a deficient number, since it is larger than the sum of its proper divisors (147494590339378).

231776782118222 is a wasteful number, since it uses less digits than its factorization.

231776782118222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623511.

The product of its digits is 12644352, while the sum is 59.

The spelling of 231776782118222 in words is "two hundred thirty-one trillion, seven hundred seventy-six billion, seven hundred eighty-two million, one hundred eighteen thousand, two hundred twenty-two".