331111145 has 8 divisors (see below), whose sum is σ = 398165760. Its totient is φ = 264334000.

The previous prime is 331111133. The next prime is 331111163. The reversal of 331111145 is 541111133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331111145 - 2⁴ = 331111129 is a prime.

It is a super-2 number, since 2×331111145² = 219269180686422050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66731 + ... + 71520.

It is an arithmetic number, because the mean of its divisors is an integer number (49770720).

Almost surely, 2^331111145 is an apocalyptic number.

It is an amenable number.

331111145 is a deficient number, since it is larger than the sum of its proper divisors (67054615).

331111145 is a wasteful number, since it uses less digits than its factorization.

331111145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138735.

The product of its digits is 180, while the sum is 20.

The square root of 331111145 is about 18196.4596831362. The cubic root of 331111145 is about 691.8170583766.

Adding to 331111145 its reverse (541111133), we get a palindrome (872222278).

The spelling of 331111145 in words is "three hundred thirty-one million, one hundred eleven thousand, one hundred forty-five".