2138955311 has 8 divisors (see below), whose sum is σ = 2292277344. Its totient is φ = 1990660320.

The previous prime is 2138955307. The next prime is 2138955367. The reversal of 2138955311 is 1135598312.

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 2138955311 - 2² = 2138955307 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 (2138955211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255880 + ... + 1257581.

It is an arithmetic number, because the mean of its divisors is an integer number (286534668).

Almost surely, 2^2138955311 is an apocalyptic number.

2138955311 is a deficient number, since it is larger than the sum of its proper divisors (153322033).

2138955311 is a wasteful number, since it uses less digits than its factorization.

2138955311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513521.

The product of its digits is 32400, while the sum is 38.

The square root of 2138955311 is about 46248.8411854827. The cubic root of 2138955311 is about 1288.4490125204.

The spelling of 2138955311 in words is "two billion, one hundred thirty-eight million, nine hundred fifty-five thousand, three hundred eleven".