2139521056 has 24 divisors (see below), whose sum is σ = 4213823040. Its totient is φ = 1069343808.

The previous prime is 2139521053. The next prime is 2139521057. The reversal of 2139521056 is 6501259312.

It is not an unprimeable number, because it can be changed into a prime (2139521051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80805 + ... + 103963.

It is an arithmetic number, because the mean of its divisors is an integer number (175575960).

Almost surely, 2^2139521056 is an apocalyptic number.

It is an amenable number.

2139521056 is a deficient number, since it is larger than the sum of its proper divisors (2074301984).

2139521056 is a wasteful number, since it uses less digits than its factorization.

2139521056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26056 (or 26048 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 2139521056 is about 46254.9570965102. The cubic root of 2139521056 is about 1288.5625990184.

The spelling of 2139521056 in words is "two billion, one hundred thirty-nine million, five hundred twenty-one thousand, fifty-six".