31223021303 has 16 divisors (see below), whose sum is σ = 32411171520. Its totient is φ = 30042507264.

The previous prime is 31223021267. The next prime is 31223021311. The reversal of 31223021303 is 30312032213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31223021303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223021363) 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, 14775575 + ... + 14777687.

It is an arithmetic number, because the mean of its divisors is an integer number (2025698220).

Almost surely, 2^31223021303 is an apocalyptic number.

31223021303 is a deficient number, since it is larger than the sum of its proper divisors (1188150217).

31223021303 is a wasteful number, since it uses less digits than its factorization.

31223021303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31223021303 its reverse (30312032213), we get a palindrome (61535053516).

The spelling of 31223021303 in words is "thirty-one billion, two hundred twenty-three million, twenty-one thousand, three hundred three".