231132218 has 8 divisors (see below), whose sum is σ = 357882240. Its totient is φ = 111838140.

The previous prime is 231132217. The next prime is 231132257. The reversal of 231132218 is 812231132.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 231132193 and 231132202.

It is not an unprimeable number, because it can be changed into a prime (231132217) 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, 1863908 + ... + 1864031.

It is an arithmetic number, because the mean of its divisors is an integer number (44735280).

Almost surely, 2^231132218 is an apocalyptic number.

231132218 is a deficient number, since it is larger than the sum of its proper divisors (126750022).

231132218 is a wasteful number, since it uses less digits than its factorization.

231132218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727972.

The product of its digits is 576, while the sum is 23.

The square root of 231132218 is about 15203.0331842037. The cubic root of 231132218 is about 613.6962868915.

The spelling of 231132218 in words is "two hundred thirty-one million, one hundred thirty-two thousand, two hundred eighteen".