2251218 has 8 divisors (see below), whose sum is σ = 4502448. Its totient is φ = 750404.

The previous prime is 2251213. The next prime is 2251229. The reversal of 2251218 is 8121522.

It is a happy number.

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

2251218 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2251194 and 2251203.

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, 187596 + ... + 187607.

It is an arithmetic number, because the mean of its divisors is an integer number (562806).

2^2251218 is an apocalyptic number.

2251218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2251218 is a wasteful number, since it uses less digits than its factorization.

2251218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375208.

The product of its digits is 320, while the sum is 21.

The square root of 2251218 is about 1500.4059450695. The cubic root of 2251218 is about 131.0607103564.

The spelling of 2251218 in words is "two million, two hundred fifty-one thousand, two hundred eighteen".