311331211230 has 64 divisors (see below), whose sum is σ = 804758955840. Its totient is φ = 76627040256.

The previous prime is 311331211171. The next prime is 311331211259. The reversal of 311331211230 is 32112133113.

It is a happy number.

It is a super-2 number, since 2×311331211230² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311331211197 and 311331211206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4038486 + ... + 4114854.

It is an arithmetic number, because the mean of its divisors is an integer number (12574358685).

Almost surely, 2^311331211230 is an apocalyptic number.

311331211230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

311331211230 is an abundant number, since it is smaller than the sum of its proper divisors (493427744610).

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

311331211230 is a wasteful number, since it uses less digits than its factorization.

311331211230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86845.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311331211230 its reverse (32112133113), we get a palindrome (343443344343).

The spelling of 311331211230 in words is "three hundred eleven billion, three hundred thirty-one million, two hundred eleven thousand, two hundred thirty".