2345031220 has 72 divisors (see below), whose sum is σ = 5752925640. Its totient is φ = 800593920.

The previous prime is 2345031209. The next prime is 2345031229. The reversal of 2345031220 is 221305432.

It can be written as a sum of positive squares in 4 ways, for example, as 201526416 + 2143504804 = 14196^2 + 46298^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2345031191 and 2345031200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2345031229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231216 + ... + 241144.

It is an arithmetic number, because the mean of its divisors is an integer number (79901745).

Almost surely, 2^2345031220 is an apocalyptic number.

2345031220 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 2345031220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876462820).

2345031220 is an abundant number, since it is smaller than the sum of its proper divisors (3407894420).

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

2345031220 is a wasteful number, since it uses less digits than its factorization.

2345031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10193 (or 10184 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2345031220 is about 48425.5224029643. The cubic root of 2345031220 is about 1328.5652117267.

Adding to 2345031220 its reverse (221305432), we get a palindrome (2566336652).

The spelling of 2345031220 in words is "two billion, three hundred forty-five million, thirty-one thousand, two hundred twenty".