3530331220 has 24 divisors (see below), whose sum is σ = 7983980424. Its totient is φ = 1303506816.

The previous prime is 3530331187. The next prime is 3530331239. The reversal of 3530331220 is 221330353.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77123524 + 3453207696 = 8782^2 + 58764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3530331191 and 3530331200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6788839 + ... + 6789358.

It is an arithmetic number, because the mean of its divisors is an integer number (332665851).

Almost surely, 2^3530331220 is an apocalyptic number.

It is an amenable number.

3530331220 is an abundant number, since it is smaller than the sum of its proper divisors (4453649204).

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

3530331220 is a wasteful number, since it uses less digits than its factorization.

3530331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13578219 (or 13578217 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 22.

The square root of 3530331220 is about 59416.5904440839. The cubic root of 3530331220 is about 1522.6677556351.

Adding to 3530331220 its reverse (221330353), we get a palindrome (3751661573).

The spelling of 3530331220 in words is "three billion, five hundred thirty million, three hundred thirty-one thousand, two hundred twenty".