231121418 has 16 divisors (see below), whose sum is σ = 378820800. Its totient is φ = 104882400.

The previous prime is 231121417. The next prime is 231121447. The reversal of 231121418 is 814121132.

It is a junction number, because it is equal to n+sod(n) for n = 231121393 and 231121402.

It is not an unprimeable number, because it can be changed into a prime (231121417) 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, 5558 + ... + 22206.

It is an arithmetic number, because the mean of its divisors is an integer number (23676300).

Almost surely, 2^231121418 is an apocalyptic number.

231121418 is a deficient number, since it is larger than the sum of its proper divisors (147699382).

231121418 is a wasteful number, since it uses less digits than its factorization.

231121418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17293.

The product of its digits is 384, while the sum is 23.

The square root of 231121418 is about 15202.6779877757. The cubic root of 231121418 is about 613.6867281158.

The spelling of 231121418 in words is "two hundred thirty-one million, one hundred twenty-one thousand, four hundred eighteen".