8216139 has 8 divisors (see below), whose sum is σ = 11209792. Its totient is φ = 5349960.

The previous prime is 8216137. The next prime is 8216149. The reversal of 8216139 is 9316128.

8216139 is nontrivially palindromic in base 14.

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

It is not a de Polignac number, because 8216139 - 2¹ = 8216137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8216137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31717 + ... + 31974.

It is an arithmetic number, because the mean of its divisors is an integer number (1401224).

Almost surely, 2^8216139 is an apocalyptic number.

8216139 is a deficient number, since it is larger than the sum of its proper divisors (2993653).

8216139 is a wasteful number, since it uses less digits than its factorization.

8216139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63737.

The product of its digits is 2592, while the sum is 30.

The square root of 8216139 is about 2866.3808190818. The cubic root of 8216139 is about 201.7851766459.

The spelling of 8216139 in words is "eight million, two hundred sixteen thousand, one hundred thirty-nine".