331230018 has 32 divisors (see below), whose sum is σ = 761757696. Its totient is φ = 94054608.

The previous prime is 331229959. The next prime is 331230037. The reversal of 331230018 is 810032133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331229976 and 331230003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17346 + ... + 31037.

It is an arithmetic number, because the mean of its divisors is an integer number (23804928).

Almost surely, 2^331230018 is an apocalyptic number.

331230018 is an abundant number, since it is smaller than the sum of its proper divisors (430527678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331230018 is a wasteful number, since it uses less digits than its factorization.

331230018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48558.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 331230018 is about 18199.7257671647. The cubic root of 331230018 is about 691.8998387670.

The spelling of 331230018 in words is "three hundred thirty-one million, two hundred thirty thousand, eighteen".