331403045 has 8 divisors (see below), whose sum is σ = 398604696. Its totient is φ = 264508416.

The previous prime is 331403029. The next prime is 331403047. The reversal of 331403045 is 540304133.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 330003556 = 1183^2 + 18166^2 .

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 331403045 - 2⁴ = 331403029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331403045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331403047) 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, 74372 + ... + 78701.

It is an arithmetic number, because the mean of its divisors is an integer number (49825587).

Almost surely, 2^331403045 is an apocalyptic number.

It is an amenable number.

331403045 is a deficient number, since it is larger than the sum of its proper divisors (67201651).

331403045 is a wasteful number, since it uses less digits than its factorization.

331403045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153511.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 331403045 is about 18204.4787071753. The cubic root of 331403045 is about 692.0202953552.

Adding to 331403045 its reverse (540304133), we get a palindrome (871707178).

The spelling of 331403045 in words is "three hundred thirty-one million, four hundred three thousand, forty-five".