31313021330223 has 16 divisors (see below), whose sum is σ = 46609517452800. Its totient is φ = 20776412253240.

The previous prime is 31313021330191. The next prime is 31313021330249. The reversal of 31313021330223 is 32203312031313.

31313021330223 is a `hidden beast` number, since 3 + 1 + 3 + 1 + 302 + 1 + 330 + 2 + 23 = 666.

It is not a de Polignac number, because 31313021330223 - 2⁵ = 31313021330191 is a prime.

It is a super-3 number, since 3×31313021330223³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313021330323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2748196983 + ... + 2748208376.

It is an arithmetic number, because the mean of its divisors is an integer number (2913094840800).

Almost surely, 2^{31313021330223} is an apocalyptic number.

31313021330223 is a deficient number, since it is larger than the sum of its proper divisors (15296496122577).

31313021330223 is a wasteful number, since it uses less digits than its factorization.

31313021330223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5496405579 (or 5496405573 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 31313021330223 its reverse (32203312031313), we get a palindrome (63516333361536).

The spelling of 31313021330223 in words is "thirty-one trillion, three hundred thirteen billion, twenty-one million, three hundred thirty thousand, two hundred twenty-three".