331331145 has 16 divisors (see below), whose sum is σ = 535597440. Its totient is φ = 174887424.

The previous prime is 331331129. The next prime is 331331149. The reversal of 331331145 is 541133133.

It is not a de Polignac number, because 331331145 - 2⁴ = 331331129 is a prime.

It is a super-2 number, since 2×331331145² = 219560655294022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331331149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112405 + ... + 115314.

It is an arithmetic number, because the mean of its divisors is an integer number (33474840).

Almost surely, 2^331331145 is an apocalyptic number.

It is an amenable number.

331331145 is a deficient number, since it is larger than the sum of its proper divisors (204266295).

331331145 is a wasteful number, since it uses less digits than its factorization.

331331145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227824.

The product of its digits is 1620, while the sum is 24.

The square root of 331331145 is about 18202.5038112893. The cubic root of 331331145 is about 691.9702456662.

Adding to 331331145 its reverse (541133133), we get a palindrome (872464278).

The spelling of 331331145 in words is "three hundred thirty-one million, three hundred thirty-one thousand, one hundred forty-five".