331145330 has 16 divisors (see below), whose sum is σ = 598691520. Its totient is φ = 131873712.

The previous prime is 331145323. The next prime is 331145333. The reversal of 331145330 is 33541133.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 331145296 and 331145305.

It is not an unprimeable number, because it can be changed into a prime (331145333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70670 + ... + 75209.

It is an arithmetic number, because the mean of its divisors is an integer number (37418220).

Almost surely, 2^331145330 is an apocalyptic number.

331145330 is a deficient number, since it is larger than the sum of its proper divisors (267546190).

331145330 is a wasteful number, since it uses less digits than its factorization.

331145330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146113.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 331145330 is about 18197.3989899656. The cubic root of 331145330 is about 691.8408660442.

Adding to 331145330 its reverse (33541133), we get a palindrome (364686463).

The spelling of 331145330 in words is "three hundred thirty-one million, one hundred forty-five thousand, three hundred thirty".