3231130221 has 24 divisors (see below), whose sum is σ = 5177783520. Its totient is φ = 1925066400.

The previous prime is 3231130219. The next prime is 3231130351. The reversal of 3231130221 is 1220311323.

3231130221 is a `hidden beast` number, since 32 + 311 + 302 + 21 = 666.

It is not a de Polignac number, because 3231130221 - 2¹ = 3231130219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3231130194 and 3231130203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231130921) 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, 270750 + ... + 282431.

It is an arithmetic number, because the mean of its divisors is an integer number (215740980).

Almost surely, 2^3231130221 is an apocalyptic number.

It is an amenable number.

3231130221 is a deficient number, since it is larger than the sum of its proper divisors (1946653299).

3231130221 is a wasteful number, since it uses less digits than its factorization.

3231130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553257 (or 553254 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3231130221 is about 56843.0314198671. The cubic root of 3231130221 is about 1478.3757169549.

Adding to 3231130221 its reverse (1220311323), we get a palindrome (4451441544).

It can be divided in two parts, 32311302 and 21, that added together give a palindrome (32311323).

The spelling of 3231130221 in words is "three billion, two hundred thirty-one million, one hundred thirty thousand, two hundred twenty-one".