2138471186 has 8 divisors (see below), whose sum is σ = 3208234764. Its totient is φ = 1069059600.

The previous prime is 2138471177. The next prime is 2138471197. The reversal of 2138471186 is 6811748312.

It can be written as a sum of positive squares in 2 ways, for example, as 2109105625 + 29365561 = 45925^2 + 5419^2 .

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

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, 72245 + ... + 97448.

Almost surely, 2^2138471186 is an apocalyptic number.

2138471186 is a deficient number, since it is larger than the sum of its proper divisors (1069763578).

2138471186 is a wasteful number, since it uses less digits than its factorization.

2138471186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175996.

The product of its digits is 64512, while the sum is 41.

The square root of 2138471186 is about 46243.6069743700. The cubic root of 2138471186 is about 1288.3517972362.

The spelling of 2138471186 in words is "two billion, one hundred thirty-eight million, four hundred seventy-one thousand, one hundred eighty-six".