731223133 has 16 divisors (see below), whose sum is σ = 778659840. Its totient is φ = 685584000.

The previous prime is 731223089. The next prime is 731223137. The reversal of 731223133 is 331322137.

It is a cyclic number.

It is not a de Polignac number, because 731223133 - 2⁹ = 731222621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731223098 and 731223107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731223137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144673 + ... + 149641.

It is an arithmetic number, because the mean of its divisors is an integer number (48666240).

Almost surely, 2^731223133 is an apocalyptic number.

It is an amenable number.

731223133 is a deficient number, since it is larger than the sum of its proper divisors (47436707).

731223133 is a wasteful number, since it uses less digits than its factorization.

731223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148.

The product of its digits is 2268, while the sum is 25.

The square root of 731223133 is about 27041.1377904111. The cubic root of 731223133 is about 900.9139411349.

The spelling of 731223133 in words is "seven hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-three".