2251216 has 20 divisors (see below), whose sum is σ = 4758624. Its totient is φ = 1023200.

The previous prime is 2251213. The next prime is 2251229. The reversal of 2251216 is 6121522.

It is a junction number, because it is equal to n+sod(n) for n = 2251193 and 2251202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6220 + ... + 6571.

2^2251216 is an apocalyptic number.

It is an amenable number.

2251216 is an abundant number, since it is smaller than the sum of its proper divisors (2507408).

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

2251216 is a wasteful number, since it uses less digits than its factorization.

2251216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12810 (or 12804 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 2251216 is about 1500.4052785831. The cubic root of 2251216 is about 131.0606715446.

Adding to 2251216 its reverse (6121522), we get a palindrome (8372738).

It can be divided in two parts, 225 and 1216, that added together give a palindrome (1441).

The spelling of 2251216 in words is "two million, two hundred fifty-one thousand, two hundred sixteen".