2140138271 has 4 divisors (see below), whose sum is σ = 2144246544. Its totient is φ = 2136030000.

The previous prime is 2140138243. The next prime is 2140138309. The reversal of 2140138271 is 1728310412.

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

It is a cyclic number.

It is not a de Polignac number, because 2140138271 - 2¹⁰ = 2140137247 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 (2140138241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053355 + ... + 2054396.

It is an arithmetic number, because the mean of its divisors is an integer number (536061636).

Almost surely, 2^2140138271 is an apocalyptic number.

2140138271 is a deficient number, since it is larger than the sum of its proper divisors (4108273).

2140138271 is an equidigital number, since it uses as much as digits as its factorization.

2140138271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108272.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2140138271 is about 46261.6284948984. The cubic root of 2140138271 is about 1288.6864964822.

Adding to 2140138271 its reverse (1728310412), we get a palindrome (3868448683).

The spelling of 2140138271 in words is "two billion, one hundred forty million, one hundred thirty-eight thousand, two hundred seventy-one".