2311981056 has 480 divisors, whose sum is σ = 8657288640. Its totient is φ = 597196800.

The previous prime is 2311981037. The next prime is 2311981097. The reversal of 2311981056 is 6501891132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2311981056.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12773286 + ... + 12773466.

It is an arithmetic number, because the mean of its divisors is an integer number (18036018).

Almost surely, 2^2311981056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311981056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4328644320).

2311981056 is an abundant number, since it is smaller than the sum of its proper divisors (6345307584).

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

2311981056 is a wasteful number, since it uses less digits than its factorization.

2311981056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 2311981056 is about 48083.0641286514. The cubic root of 2311981056 is about 1322.2941921463.

The spelling of 2311981056 in words is "two billion, three hundred eleven million, nine hundred eighty-one thousand, fifty-six".