3132213221 has 4 divisors (see below), whose sum is σ = 3135306252. Its totient is φ = 3129120192.

The previous prime is 3132213193. The next prime is 3132213269. The reversal of 3132213221 is 1223122313.

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 745890721 + 2386322500 = 27311^2 + 48850^2 .

It is a cyclic number.

It is not a de Polignac number, because 3132213221 - 2³⁰ = 2058471397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3132213193 and 3132213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3132219221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544996 + ... + 1547021.

It is an arithmetic number, because the mean of its divisors is an integer number (783826563).

Almost surely, 2^3132213221 is an apocalyptic number.

It is an amenable number.

3132213221 is a deficient number, since it is larger than the sum of its proper divisors (3093031).

3132213221 is a wasteful number, since it uses less digits than its factorization.

3132213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093030.

The product of its digits is 432, while the sum is 20.

The square root of 3132213221 is about 55966.1792603354. The cubic root of 3132213221 is about 1463.1328893117.

Adding to 3132213221 its reverse (1223122313), we get a palindrome (4355335534).

The spelling of 3132213221 in words is "three billion, one hundred thirty-two million, two hundred thirteen thousand, two hundred twenty-one".