2179922138 has 16 divisors (see below), whose sum is σ = 3482251560. Its totient is φ = 1019913216.

The previous prime is 2179922113. The next prime is 2179922149. The reversal of 2179922138 is 8312299712.

It can be written as a sum of positive squares in 4 ways, for example, as 2078174569 + 101747569 = 45587^2 + 10087^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179423 + ... + 191186.

Almost surely, 2^2179922138 is an apocalyptic number.

2179922138 is a deficient number, since it is larger than the sum of its proper divisors (1302329422).

2179922138 is a wasteful number, since it uses less digits than its factorization.

2179922138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370801.

The product of its digits is 108864, while the sum is 44.

The square root of 2179922138 is about 46689.6363018604. The cubic root of 2179922138 is about 1296.6228196577.

The spelling of 2179922138 in words is "two billion, one hundred seventy-nine million, nine hundred twenty-two thousand, one hundred thirty-eight".