3130312321 has 4 divisors (see below), whose sum is σ = 3206661444. Its totient is φ = 3053963200.

The previous prime is 3130312313. The next prime is 3130312349. The reversal of 3130312321 is 1232130313.

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 181279296 + 2949033025 = 13464^2 + 54305^2 .

It is a cyclic number.

It is not a de Polignac number, because 3130312321 - 2³ = 3130312313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3130312021) 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, 38174500 + ... + 38174581.

It is an arithmetic number, because the mean of its divisors is an integer number (801665361).

Almost surely, 2^3130312321 is an apocalyptic number.

It is an amenable number.

3130312321 is a deficient number, since it is larger than the sum of its proper divisors (76349123).

3130312321 is an equidigital number, since it uses as much as digits as its factorization.

3130312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76349122.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3130312321 is about 55949.1941050092. The cubic root of 3130312321 is about 1462.8368438915.

Adding to 3130312321 its reverse (1232130313), we get a palindrome (4362442634).

The spelling of 3130312321 in words is "three billion, one hundred thirty million, three hundred twelve thousand, three hundred twenty-one".