3215043220 has 24 divisors (see below), whose sum is σ = 6934067784. Its totient is φ = 1251259776.

The previous prime is 3215043203. The next prime is 3215043233. The reversal of 3215043220 is 223405123.

It can be written as a sum of positive squares in 4 ways, for example, as 1858299664 + 1356743556 = 43108^2 + 36834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3215043191 and 3215043200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2171587 + ... + 2173066.

It is an arithmetic number, because the mean of its divisors is an integer number (288919491).

Almost surely, 2^3215043220 is an apocalyptic number.

It is an amenable number.

3215043220 is an abundant number, since it is smaller than the sum of its proper divisors (3719024564).

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

3215043220 is a wasteful number, since it uses less digits than its factorization.

3215043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344699 (or 4344697 counting only the distinct ones).

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

The square root of 3215043220 is about 56701.3511302861. The cubic root of 3215043220 is about 1475.9181444411.

Adding to 3215043220 its reverse (223405123), we get a palindrome (3438448343).

The spelling of 3215043220 in words is "three billion, two hundred fifteen million, forty-three thousand, two hundred twenty".