331320004 has 18 divisors (see below), whose sum is σ = 615924890. Its totient is φ = 155914752.

The previous prime is 331320001. The next prime is 331320019. The reversal of 331320004 is 400023133.

It can be written as a sum of positive squares in 3 ways, for example, as 31337604 + 299982400 = 5598^2 + 17320^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 331320004.

It is not an unprimeable number, because it can be changed into a prime (331320001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142149 + ... + 144460.

Almost surely, 2^331320004 is an apocalyptic number.

331320004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

331320004 is a deficient number, since it is larger than the sum of its proper divisors (284604886).

331320004 is a wasteful number, since it uses less digits than its factorization.

331320004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286647 (or 286628 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 331320004 is about 18202.1977793892. The cubic root of 331320004 is about 691.9624897529.

Adding to 331320004 its reverse (400023133), we get a palindrome (731343137).

The spelling of 331320004 in words is "three hundred thirty-one million, three hundred twenty thousand, four".