331312433 has 6 divisors (see below), whose sum is σ = 333041766. Its totient is φ = 329592032.

The previous prime is 331312427. The next prime is 331312453. The reversal of 331312433 is 334213133.

It can be written as a sum of positive squares in 3 ways, for example, as 299186209 + 32126224 = 17297^2 + 5668^2 .

It is not a de Polignac number, because 331312433 - 2⁴ = 331312417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331312399 and 331312408.

It is not an unprimeable number, because it can be changed into a prime (331312453) 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, 34541 + ... + 43077.

It is an arithmetic number, because the mean of its divisors is an integer number (55506961).

Almost surely, 2^331312433 is an apocalyptic number.

It is an amenable number.

331312433 is a deficient number, since it is larger than the sum of its proper divisors (1729333).

331312433 is an frugal number, since it uses more digits than its factorization.

331312433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8931 (or 8734 counting only the distinct ones).

The product of its digits is 1944, while the sum is 23.

The square root of 331312433 is about 18201.9898088094. The cubic root of 331312433 is about 691.9572190299.

Adding to 331312433 its reverse (334213133), we get a palindrome (665525566).

The spelling of 331312433 in words is "three hundred thirty-one million, three hundred twelve thousand, four hundred thirty-three".