231381223 has 4 divisors (see below), whose sum is σ = 231545248. Its totient is φ = 231217200.

The previous prime is 231381211. The next prime is 231381233. The reversal of 231381223 is 322183132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231381223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231381233) 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, 79878 + ... + 82723.

It is an arithmetic number, because the mean of its divisors is an integer number (57886312).

Almost surely, 2^231381223 is an apocalyptic number.

231381223 is a deficient number, since it is larger than the sum of its proper divisors (164025).

231381223 is a wasteful number, since it uses less digits than its factorization.

231381223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164024.

The product of its digits is 1728, while the sum is 25.

The square root of 231381223 is about 15211.2202995026. The cubic root of 231381223 is about 613.9165916755.

The spelling of 231381223 in words is "two hundred thirty-one million, three hundred eighty-one thousand, two hundred twenty-three".