2138505311 has 8 divisors (see below), whose sum is σ = 2187632640. Its totient is φ = 2089529208.

The previous prime is 2138505301. The next prime is 2138505323. The reversal of 2138505311 is 1135058312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2138505311 - 2³⁰ = 1064763487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138505301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8951 + ... + 66008.

It is an arithmetic number, because the mean of its divisors is an integer number (273454080).

Almost surely, 2^2138505311 is an apocalyptic number.

2138505311 is a deficient number, since it is larger than the sum of its proper divisors (49127329).

2138505311 is an equidigital number, since it uses as much as digits as its factorization.

2138505311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75613.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2138505311 is about 46243.9759428188. The cubic root of 2138505311 is about 1288.3586502272.

The spelling of 2138505311 in words is "two billion, one hundred thirty-eight million, five hundred five thousand, three hundred eleven".