231218084 has 24 divisors (see below), whose sum is σ = 410571000. Its totient is φ = 113921280.

The previous prime is 231217993. The next prime is 231218093. The reversal of 231218084 is 480812132.

It can be written as a sum of positive squares in 4 ways, for example, as 178084 + 231040000 = 422^2 + 15200^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123314 + ... + 125174.

It is an arithmetic number, because the mean of its divisors is an integer number (17107125).

Almost surely, 2^231218084 is an apocalyptic number.

It is an amenable number.

231218084 is a deficient number, since it is larger than the sum of its proper divisors (179352916).

231218084 is a wasteful number, since it uses less digits than its factorization.

231218084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303 (or 2301 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 231218084 is about 15205.8568979193. The cubic root of 231218084 is about 613.7722738766.

The spelling of 231218084 in words is "two hundred thirty-one million, two hundred eighteen thousand, eighty-four".