31223331323 has 4 divisors (see below), whose sum is σ = 31223685408. Its totient is φ = 31222977240.

The previous prime is 31223331319. The next prime is 31223331341. The reversal of 31223331323 is 32313332213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31223331323 - 2² = 31223331319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31223331292 and 31223331301.

It is not an unprimeable number, because it can be changed into a prime (31223321323) 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, 72053 + ... + 260073.

It is an arithmetic number, because the mean of its divisors is an integer number (7805921352).

Almost surely, 2^31223331323 is an apocalyptic number.

31223331323 is a deficient number, since it is larger than the sum of its proper divisors (354085).

31223331323 is a wasteful number, since it uses less digits than its factorization.

31223331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354084.

The product of its digits is 5832, while the sum is 26.

Adding to 31223331323 its reverse (32313332213), we get a palindrome (63536663536).

The spelling of 31223331323 in words is "thirty-one billion, two hundred twenty-three million, three hundred thirty-one thousand, three hundred twenty-three".