231040018 has 8 divisors (see below), whose sum is σ = 378065520. Its totient is φ = 105018180.

The previous prime is 231040009. The next prime is 231040027. The reversal of 231040018 is 810040132.

It is an interprime number because it is at equal distance from previous prime (231040009) and next prime (231040027).

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 = 231039977 and 231040004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250888 + ... + 5250931.

It is an arithmetic number, because the mean of its divisors is an integer number (47258190).

Almost surely, 2^231040018 is an apocalyptic number.

231040018 is a deficient number, since it is larger than the sum of its proper divisors (147025502).

231040018 is a wasteful number, since it uses less digits than its factorization.

231040018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501832.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 231040018 is about 15200.0005921053. Note that the first 3 decimals coincide. The cubic root of 231040018 is about 613.6146736868.

The spelling of 231040018 in words is "two hundred thirty-one million, forty thousand, eighteen".