2139022855 has 4 divisors (see below), whose sum is σ = 2566827432. Its totient is φ = 1711218280.

The previous prime is 2139022817. The next prime is 2139022883. The reversal of 2139022855 is 5582209312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2139022855 - 2¹⁹ = 2138498567 is a prime.

It is a Duffinian number.

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, 213902281 + ... + 213902290.

It is an arithmetic number, because the mean of its divisors is an integer number (641706858).

Almost surely, 2^2139022855 is an apocalyptic number.

2139022855 is a deficient number, since it is larger than the sum of its proper divisors (427804577).

2139022855 is an equidigital number, since it uses as much as digits as its factorization.

2139022855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427804576.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2139022855 is about 46249.5714034195. The cubic root of 2139022855 is about 1288.4625746058.

The spelling of 2139022855 in words is "two billion, one hundred thirty-nine million, twenty-two thousand, eight hundred fifty-five".