2031220 has 12 divisors (see below), whose sum is σ = 4265604. Its totient is φ = 812480.

The previous prime is 2031217. The next prime is 2031223. The reversal of 2031220 is 221302.

It is an interprime number because it is at equal distance from previous prime (2031217) and next prime (2031223).

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 1710864 = 566^2 + 1308^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2031197 and 2031206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031223) 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, 50761 + ... + 50800.

It is an arithmetic number, because the mean of its divisors is an integer number (355467).

2^2031220 is an apocalyptic number.

2031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031220 is an abundant number, since it is smaller than the sum of its proper divisors (2234384).

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

2031220 is a wasteful number, since it uses less digits than its factorization.

2031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101570 (or 101568 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2031220 is about 1425.2087566388. The cubic root of 2031220 is about 126.6443019917.

Adding to 2031220 its reverse (221302), we get a palindrome (2252522).

The spelling of 2031220 in words is "two million, thirty-one thousand, two hundred twenty".