331145 has 8 divisors (see below), whose sum is σ = 401856. Its totient is φ = 261936.

The previous prime is 331141. The next prime is 331147. The reversal of 331145 is 541133.

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

It is a cyclic number.

It is not a de Polignac number, because 331145 - 2² = 331141 is a prime.

It is a super-2 number, since 2×331145² = 219314022050, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331145.

It is not an unprimeable number, because it can be changed into a prime (331141) 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, 194 + ... + 836.

It is an arithmetic number, because the mean of its divisors is an integer number (50232).

2³³¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

331145 is a deficient number, since it is larger than the sum of its proper divisors (70711).

331145 is a wasteful number, since it uses less digits than its factorization.

331145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its digits is 180, while the sum is 17.

The square root of 331145 is about 575.4519962603. The cubic root of 331145 is about 69.1840636228.

Adding to 331145 its reverse (541133), we get a palindrome (872278).

The spelling of 331145 in words is "three hundred thirty-one thousand, one hundred forty-five".