3129314221 has 6 divisors (see below), whose sum is σ = 3439659566. Its totient is φ = 2844831000.

The previous prime is 3129314171. The next prime is 3129314239. The reversal of 3129314221 is 1224139213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2310724900 + 818589321 = 48070^2 + 28611^2 .

It is not a de Polignac number, because 3129314221 - 2⁷ = 3129314093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3129314221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129314521) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12930930 + ... + 12931171.

Almost surely, 2^3129314221 is an apocalyptic number.

It is an amenable number.

3129314221 is a deficient number, since it is larger than the sum of its proper divisors (310345345).

3129314221 is a wasteful number, since it uses less digits than its factorization.

3129314221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25862123 (or 25862112 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 3129314221 is about 55940.2736943608. The cubic root of 3129314221 is about 1462.6813522013.

The spelling of 3129314221 in words is "three billion, one hundred twenty-nine million, three hundred fourteen thousand, two hundred twenty-one".