2117158138 has 8 divisors (see below), whose sum is σ = 3362545332. Its totient is φ = 996309696.

The previous prime is 2117158103. The next prime is 2117158139. The reversal of 2117158138 is 8318517112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2116644049 + 514089 = 46007^2 + 717^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2117158097 and 2117158106.

It is not an unprimeable number, because it can be changed into a prime (2117158139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31134645 + ... + 31134712.

Almost surely, 2^2117158138 is an apocalyptic number.

2117158138 is a deficient number, since it is larger than the sum of its proper divisors (1245387194).

2117158138 is a wasteful number, since it uses less digits than its factorization.

2117158138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62269376.

The product of its digits is 13440, while the sum is 37.

The square root of 2117158138 is about 46012.5867345012. The cubic root of 2117158138 is about 1284.0573843816.

The spelling of 2117158138 in words is "two billion, one hundred seventeen million, one hundred fifty-eight thousand, one hundred thirty-eight".