331244345 has 4 divisors (see below), whose sum is σ = 397493220. Its totient is φ = 264995472.

The previous prime is 331244341. The next prime is 331244369. The reversal of 331244345 is 543442133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543442133 = 13 ⋅41803241.

It can be written as a sum of positive squares in 2 ways, for example, as 158558464 + 172685881 = 12592^2 + 13141^2 .

It is a cyclic number.

It is not a de Polignac number, because 331244345 - 2² = 331244341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (331244341) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33124430 + ... + 33124439.

It is an arithmetic number, because the mean of its divisors is an integer number (99373305).

Almost surely, 2^331244345 is an apocalyptic number.

It is an amenable number.

331244345 is a deficient number, since it is larger than the sum of its proper divisors (66248875).

331244345 is an equidigital number, since it uses as much as digits as its factorization.

331244345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66248874.

The product of its digits is 17280, while the sum is 29.

The square root of 331244345 is about 18200.1193677404. The cubic root of 331244345 is about 691.9098144189.

Adding to 331244345 its reverse (543442133), we get a palindrome (874686478).

The spelling of 331244345 in words is "three hundred thirty-one million, two hundred forty-four thousand, three hundred forty-five".