2139216 has 40 divisors (see below), whose sum is σ = 5666304. Its totient is φ = 695040.

The previous prime is 2139211. The next prime is 2139227. The reversal of 2139216 is 6129312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139211) 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, 1425 + ... + 2511.

2^2139216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2833152).

2139216 is an abundant number, since it is smaller than the sum of its proper divisors (3527088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139216 is a wasteful number, since it uses less digits than its factorization.

2139216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1133 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 2139216 is about 1462.6058936022. The cubic root of 2139216 is about 128.8501354402.

The spelling of 2139216 in words is "two million, one hundred thirty-nine thousand, two hundred sixteen".