31000223223 has 12 divisors (see below), whose sum is σ = 45212840400. Its totient is φ = 20466166176.

The previous prime is 31000223213. The next prime is 31000223257. The reversal of 31000223223 is 32232200013.

It is a happy number.

It is not a de Polignac number, because 31000223223 - 2³⁰ = 29926481399 is a prime.

It is a super-2 number, since 2×31000223223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000223196 and 31000223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000223213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16719798 + ... + 16721651.

It is an arithmetic number, because the mean of its divisors is an integer number (3767736700).

Almost surely, 2^31000223223 is an apocalyptic number.

31000223223 is a deficient number, since it is larger than the sum of its proper divisors (14212617177).

31000223223 is a wasteful number, since it uses less digits than its factorization.

31000223223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33441558 (or 33441555 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31000223223 its reverse (32232200013), we get a palindrome (63232423236).

The spelling of 31000223223 in words is "thirty-one billion, two hundred twenty-three thousand, two hundred twenty-three".