16117138 has 4 divisors (see below), whose sum is σ = 24175710. Its totient is φ = 8058568.

The previous prime is 16117121. The next prime is 16117151. The reversal of 16117138 is 83171161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83171161 = 103 ⋅807487.

It can be written as a sum of positive squares in only one way, i.e., 8625969 + 7491169 = 2937^2 + 2737^2 .

It is a super-2 number, since 2×16117138² = 519524274622088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4029283 + ... + 4029286.

Almost surely, 2^16117138 is an apocalyptic number.

16117138 is a deficient number, since it is larger than the sum of its proper divisors (8058572).

16117138 is an equidigital number, since it uses as much as digits as its factorization.

16117138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058571.

The product of its digits is 1008, while the sum is 28.

The square root of 16117138 is about 4014.6155482188. The cubic root of 16117138 is about 252.5976513451.

Adding to 16117138 its reverse (83171161), we get a palindrome (99288299).

The spelling of 16117138 in words is "sixteen million, one hundred seventeen thousand, one hundred thirty-eight".