31111323223 has 16 divisors (see below), whose sum is σ = 31647974400. Its totient is φ = 30580333056.

The previous prime is 31111323179. The next prime is 31111323239. The reversal of 31111323223 is 32232311113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31111323223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31111323194 and 31111323203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111323823) 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, 8191761 + ... + 8195557.

It is an arithmetic number, because the mean of its divisors is an integer number (1977998400).

Almost surely, 2^31111323223 is an apocalyptic number.

31111323223 is a deficient number, since it is larger than the sum of its proper divisors (536651177).

31111323223 is a wasteful number, since it uses less digits than its factorization.

31111323223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506.

The product of its digits is 648, while the sum is 22.

Adding to 31111323223 its reverse (32232311113), we get a palindrome (63343634336).

The spelling of 31111323223 in words is "thirty-one billion, one hundred eleven million, three hundred twenty-three thousand, two hundred twenty-three".