231818481 has 12 divisors (see below), whose sum is σ = 335047440. Its totient is φ = 154454040.

The previous prime is 231818453. The next prime is 231818491. The reversal of 231818481 is 184818132.

231818481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231818481 - 2⁶ = 231818417 is a prime.

It is a super-2 number, since 2×231818481² = 107479616266294722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231818401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10710 + ... + 24048.

It is an arithmetic number, because the mean of its divisors is an integer number (27920620).

Almost surely, 2^231818481 is an apocalyptic number.

It is an amenable number.

231818481 is a deficient number, since it is larger than the sum of its proper divisors (103228959).

231818481 is a wasteful number, since it uses less digits than its factorization.

231818481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15276 (or 15273 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 231818481 is about 15225.5863926484. The cubic root of 231818481 is about 614.3030693363.

The spelling of 231818481 in words is "two hundred thirty-one million, eight hundred eighteen thousand, four hundred eighty-one".