16217139 has 16 divisors (see below), whose sum is σ = 22804992. Its totient is φ = 10230528.

The previous prime is 16217087. The next prime is 16217141. The reversal of 16217139 is 93171261.

It is not a de Polignac number, because 16217139 - 2¹⁷ = 16086067 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16217339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5482 + ... + 7904.

It is an arithmetic number, because the mean of its divisors is an integer number (1425312).

Almost surely, 2^16217139 is an apocalyptic number.

16217139 is a deficient number, since it is larger than the sum of its proper divisors (6587853).

16217139 is a wasteful number, since it uses less digits than its factorization.

16217139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546.

The product of its digits is 2268, while the sum is 30.

The square root of 16217139 is about 4027.0509060602. The cubic root of 16217139 is about 253.1190001931.

The spelling of 16217139 in words is "sixteen million, two hundred seventeen thousand, one hundred thirty-nine".