231226181 has 8 divisors (see below), whose sum is σ = 244326720. Its totient is φ = 218218752.

The previous prime is 231226157. The next prime is 231226187. The reversal of 231226181 is 181622132.

231226181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231226181 - 2²² = 227031877 is a prime.

It is a super-2 number, since 2×231226181² = 106931093559689522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231226181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231226187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18140 + ... + 28133.

It is an arithmetic number, because the mean of its divisors is an integer number (30540840).

Almost surely, 2^231226181 is an apocalyptic number.

It is an amenable number.

231226181 is a deficient number, since it is larger than the sum of its proper divisors (13100539).

231226181 is a wasteful number, since it uses less digits than its factorization.

231226181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46555.

The product of its digits is 1152, while the sum is 26.

The square root of 231226181 is about 15206.1231416821. The cubic root of 231226181 is about 613.7794383337.

The spelling of 231226181 in words is "two hundred thirty-one million, two hundred twenty-six thousand, one hundred eighty-one".