231310018 has 8 divisors (see below), whose sum is σ = 347118480. Its totient is φ = 115603860.

The previous prime is 231309997. The next prime is 231310019. The reversal of 231310018 is 810013132.

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 = 231309977 and 231310004.

It is not an unprimeable number, because it can be changed into a prime (231310019) 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, 19648 + ... + 29131.

It is an arithmetic number, because the mean of its divisors is an integer number (43389810).

Almost surely, 2^231310018 is an apocalyptic number.

231310018 is a deficient number, since it is larger than the sum of its proper divisors (115808462).

231310018 is a wasteful number, since it uses less digits than its factorization.

231310018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51152.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 231310018 is about 15208.8795774048. The cubic root of 231310018 is about 613.8536098782.

It can be divided in two parts, 231 and 310018, that added together give a square (310249 = 557²).

The spelling of 231310018 in words is "two hundred thirty-one million, three hundred ten thousand, eighteen".