231226881 has 8 divisors (see below), whose sum is σ = 308373120. Its totient is φ = 154115952.

The previous prime is 231226873. The next prime is 231226901. The reversal of 231226881 is 188622132.

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

It is not a de Polignac number, because 231226881 - 2³ = 231226873 is a prime.

It is a super-2 number, since 2×231226881² = 106931740993976322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231226811) 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, 18891 + ... + 28623.

It is an arithmetic number, because the mean of its divisors is an integer number (38546640).

Almost surely, 2^231226881 is an apocalyptic number.

It is an amenable number.

231226881 is a deficient number, since it is larger than the sum of its proper divisors (77146239).

231226881 is an equidigital number, since it uses as much as digits as its factorization.

231226881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17655.

The product of its digits is 9216, while the sum is 33.

The square root of 231226881 is about 15206.1461587083. The cubic root of 231226881 is about 613.7800577058.

It can be divided in two parts, 23122 and 6881, that added together give a palindrome (30003).

The spelling of 231226881 in words is "two hundred thirty-one million, two hundred twenty-six thousand, eight hundred eighty-one".