2139181056 has 312 divisors, whose sum is σ = 6848986560. Its totient is φ = 658538496.

The previous prime is 2139181013. The next prime is 2139181067. The reversal of 2139181056 is 6501819312.

It is a super-5 number, since 5×2139181056⁵ (a number of 48 digits) contains 55555 as substring.

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 2139181056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73764850 + ... + 73764878.

It is an arithmetic number, because the mean of its divisors is an integer number (21951880).

Almost surely, 2^2139181056 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 2139181056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3424493280).

2139181056 is an abundant number, since it is smaller than the sum of its proper divisors (4709805504).

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

2139181056 is an equidigital number, since it uses as much as digits as its factorization.

2139181056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 57 counting only the distinct ones).

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

The square root of 2139181056 is about 46251.2816687278. The cubic root of 2139181056 is about 1288.4943384931.

The spelling of 2139181056 in words is "two billion, one hundred thirty-nine million, one hundred eighty-one thousand, fifty-six".