2251220 has 24 divisors (see below), whose sum is σ = 4881408. Its totient is φ = 871200.

The previous prime is 2251213. The next prime is 2251229. The reversal of 2251220 is 221522.

It is a junction number, because it is equal to n+sod(n) for n = 2251195 and 2251204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251229) 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, 1196 + ... + 2435.

It is an arithmetic number, because the mean of its divisors is an integer number (203392).

2^2251220 is an apocalyptic number.

2251220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2251220 is an abundant number, since it is smaller than the sum of its proper divisors (2630188).

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

2251220 is a wasteful number, since it uses less digits than its factorization.

2251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2251220 is about 1500.4066115557. The cubic root of 2251220 is about 131.0607491682.

Adding to 2251220 its reverse (221522), we get a palindrome (2472742).

The spelling of 2251220 in words is "two million, two hundred fifty-one thousand, two hundred twenty".