2138505312 has 24 divisors (see below), whose sum is σ = 5613576696. Its totient is φ = 712835072.

The previous prime is 2138505301. The next prime is 2138505323. The reversal of 2138505312 is 2135058312.

It is an interprime number because it is at equal distance from previous prime (2138505301) and next prime (2138505323).

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2138505312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11137953 + ... + 11138144.

It is an arithmetic number, because the mean of its divisors is an integer number (233899029).

Almost surely, 2^2138505312 is an apocalyptic number.

It is an amenable number.

2138505312 is an abundant number, since it is smaller than the sum of its proper divisors (3475071384).

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

2138505312 is a wasteful number, since it uses less digits than its factorization.

2138505312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22276110 (or 22276102 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2138505312 is about 46243.9759536310. The cubic root of 2138505312 is about 1288.3586504280.

The spelling of 2138505312 in words is "two billion, one hundred thirty-eight million, five hundred five thousand, three hundred twelve".