331405345 has 16 divisors (see below), whose sum is σ = 411079680. Its totient is φ = 256219200.

The previous prime is 331405331. The next prime is 331405379. The reversal of 331405345 is 543504133.

It is not a de Polignac number, because 331405345 - 2⁵ = 331405313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203635 + ... + 205255.

It is an arithmetic number, because the mean of its divisors is an integer number (25692480).

Almost surely, 2^331405345 is an apocalyptic number.

It is an amenable number.

331405345 is a deficient number, since it is larger than the sum of its proper divisors (79674335).

331405345 is a wasteful number, since it uses less digits than its factorization.

331405345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 331405345 is about 18204.5418783335. The cubic root of 331405345 is about 692.0218962688.

Adding to 331405345 its reverse (543504133), we get a palindrome (874909478).

The spelling of 331405345 in words is "three hundred thirty-one million, four hundred five thousand, three hundred forty-five".