2138213338 has 4 divisors (see below), whose sum is σ = 3207320010. Its totient is φ = 1069106668.

The previous prime is 2138213257. The next prime is 2138213339. The reversal of 2138213338 is 8333128312.

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

It can be written as a sum of positive squares in only one way, i.e., 1329550369 + 808662969 = 36463^2 + 28437^2 .

It is a super-2 number, since 2×2138213338² = 9143912557602204488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2138213339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534553333 + ... + 534553336.

Almost surely, 2^2138213338 is an apocalyptic number.

2138213338 is a deficient number, since it is larger than the sum of its proper divisors (1069106672).

2138213338 is a wasteful number, since it uses less digits than its factorization.

2138213338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069106671.

The product of its digits is 20736, while the sum is 34.

The square root of 2138213338 is about 46240.8189590107. The cubic root of 2138213338 is about 1288.3000137801.

The spelling of 2138213338 in words is "two billion, one hundred thirty-eight million, two hundred thirteen thousand, three hundred thirty-eight".