2031616 has 34 divisors (see below), whose sum is σ = 4194272. Its totient is φ = 983040.

The previous prime is 2031611. The next prime is 2031671. The reversal of 2031616 is 6161302.

It is a nialpdrome in base 2 and base 8.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2031593 and 2031602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65521 + ... + 65551.

2^2031616 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 2031616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097136).

2031616 is an abundant number, since it is smaller than the sum of its proper divisors (2162656).

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

2031616 is an frugal number, since it uses more digits than its factorization.

2031616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2031616 is about 1425.3476768845. The cubic root of 2031616 is about 126.6525315098.

Adding to 2031616 its reverse (6161302), we get a palindrome (8192918).

The spelling of 2031616 in words is "two million, thirty-one thousand, six hundred sixteen".