3231000221 has 4 divisors (see below), whose sum is σ = 3275260572. Its totient is φ = 3186739872.

The previous prime is 3231000163. The next prime is 3231000239. The reversal of 3231000221 is 1220001323.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2757720196 + 473280025 = 52514^2 + 21755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3231000221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3231000196 and 3231000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231000251) 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, 22130066 + ... + 22130211.

It is an arithmetic number, because the mean of its divisors is an integer number (818815143).

Almost surely, 2^3231000221 is an apocalyptic number.

It is an amenable number.

3231000221 is a deficient number, since it is larger than the sum of its proper divisors (44260351).

3231000221 is an equidigital number, since it uses as much as digits as its factorization.

3231000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44260350.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3231000221 is about 56841.8879084782. The cubic root of 3231000221 is about 1478.3558898967.

Adding to 3231000221 its reverse (1220001323), we get a palindrome (4451001544).

The spelling of 3231000221 in words is "three billion, two hundred thirty-one million, two hundred twenty-one", and thus it is an aban number.