231776782118223 has 4 divisors (see below), whose sum is σ = 309035709490968. Its totient is φ = 154517854745480.

The previous prime is 231776782118209. The next prime is 231776782118257. The reversal of 231776782118223 is 322811287677132.

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

It is a cyclic number.

It is not a de Polignac number, because 231776782118223 - 2⁵ = 231776782118191 is a prime.

It is a super-3 number, since 3×231776782118223³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231776782118293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38629463686368 + ... + 38629463686373.

It is an arithmetic number, because the mean of its divisors is an integer number (77258927372742).

Almost surely, 2^{231776782118223} is an apocalyptic number.

231776782118223 is a deficient number, since it is larger than the sum of its proper divisors (77258927372745).

231776782118223 is an equidigital number, since it uses as much as digits as its factorization.

231776782118223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77258927372744.

The product of its digits is 18966528, while the sum is 60.

The spelling of 231776782118223 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-three".