3111232320 has 672 divisors, whose sum is σ = 12985260288. Its totient is φ = 668860416.

The previous prime is 3111232303. The next prime is 3111232331. The reversal of 3111232320 is 232321113.

3111232320 is a `hidden beast` number, since 3 + 111 + 232 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3111232293 and 3111232302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32074512 + ... + 32074608.

It is an arithmetic number, because the mean of its divisors is an integer number (19323304).

Almost surely, 2^3111232320 is an apocalyptic number.

3111232320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3111232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6492630144).

3111232320 is an abundant number, since it is smaller than the sum of its proper divisors (9874027968).

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

3111232320 is a wasteful number, since it uses less digits than its factorization.

3111232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3111232320 is about 55778.4216341768. The cubic root of 3111232320 is about 1459.8586715015.

Adding to 3111232320 its reverse (232321113), we get a palindrome (3343553433).

The spelling of 3111232320 in words is "three billion, one hundred eleven million, two hundred thirty-two thousand, three hundred twenty".