31311111230 has 48 divisors (see below), whose sum is σ = 65579720256. Its totient is φ = 10732276800.

The previous prime is 31311111229. The next prime is 31311111233. The reversal of 31311111230 is 3211111313.

It is a super-2 number, since 2×31311111230² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31311111199 and 31311111208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311111233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2493227 + ... + 2505753.

It is an arithmetic number, because the mean of its divisors is an integer number (1366244172).

Almost surely, 2^31311111230 is an apocalyptic number.

31311111230 is an abundant number, since it is smaller than the sum of its proper divisors (34268609026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311111230 is a wasteful number, since it uses less digits than its factorization.

31311111230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17649 (or 17642 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31311111230 its reverse (3211111313), we get a palindrome (34522222543).

The spelling of 31311111230 in words is "thirty-one billion, three hundred eleven million, one hundred eleven thousand, two hundred thirty".