2138658143 has 4 divisors (see below), whose sum is σ = 2139586680. Its totient is φ = 2137729608.

The previous prime is 2138658131. The next prime is 2138658187. The reversal of 2138658143 is 3418568312.

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 2138658143 - 2⁶ = 2138658079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138658143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138658103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460805 + ... + 465422.

It is an arithmetic number, because the mean of its divisors is an integer number (534896670).

Almost surely, 2^2138658143 is an apocalyptic number.

2138658143 is a deficient number, since it is larger than the sum of its proper divisors (928537).

2138658143 is an equidigital number, since it uses as much as digits as its factorization.

2138658143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928536.

The product of its digits is 138240, while the sum is 41.

The square root of 2138658143 is about 46245.6283663656. The cubic root of 2138658143 is about 1288.3893410930.

The spelling of 2138658143 in words is "two billion, one hundred thirty-eight million, six hundred fifty-eight thousand, one hundred forty-three".