2351220 has 48 divisors (see below), whose sum is σ = 6652800. Its totient is φ = 620416.

The previous prime is 2351207. The next prime is 2351263. The reversal of 2351220 is 221532.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2351220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8809 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^2351220 is an apocalyptic number.

2351220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2351220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3326400).

2351220 is an abundant number, since it is smaller than the sum of its proper divisors (4301580).

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

2351220 is a wasteful number, since it uses less digits than its factorization.

2351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2351220 is about 1533.3688401686. The cubic root of 2351220 is about 132.9732925437.

Adding to 2351220 its reverse (221532), we get a palindrome (2572752).

It can be divided in two parts, 23512 and 20, that added together give a palindrome (23532).

The spelling of 2351220 in words is "two million, three hundred fifty-one thousand, two hundred twenty".