731343331 has 4 divisors (see below), whose sum is σ = 734537200. Its totient is φ = 728149464.

The previous prime is 731343293. The next prime is 731343341. The reversal of 731343331 is 133343137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 731343331 - 2⁷ = 731343203 is a prime.

It is a super-2 number, since 2×731343331² = 1069726135596351122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 731343331.

It is not an unprimeable number, because it can be changed into a prime (731343341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596591 + ... + 1597048.

It is an arithmetic number, because the mean of its divisors is an integer number (183634300).

Almost surely, 2^731343331 is an apocalyptic number.

731343331 is a deficient number, since it is larger than the sum of its proper divisors (3193869).

731343331 is a wasteful number, since it uses less digits than its factorization.

731343331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193868.

The product of its digits is 6804, while the sum is 28.

The square root of 731343331 is about 27043.3602017205. The cubic root of 731343331 is about 900.9633023199.

Adding to 731343331 its reverse (133343137), we get a palindrome (864686468).

The spelling of 731343331 in words is "seven hundred thirty-one million, three hundred forty-three thousand, three hundred thirty-one".