3145921321 has 4 divisors (see below), whose sum is σ = 3190230144. Its totient is φ = 3101612500.

The previous prime is 3145921319. The next prime is 3145921327. The reversal of 3145921321 is 1231295413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3145921321 - 2¹ = 3145921319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145921327) 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 3 ways as a sum of consecutive naturals, for example, 22154305 + ... + 22154446.

It is an arithmetic number, because the mean of its divisors is an integer number (797557536).

Almost surely, 2^3145921321 is an apocalyptic number.

It is an amenable number.

3145921321 is a deficient number, since it is larger than the sum of its proper divisors (44308823).

3145921321 is an equidigital number, since it uses as much as digits as its factorization.

3145921321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44308822.

The product of its digits is 6480, while the sum is 31.

The square root of 3145921321 is about 56088.5132714355. The cubic root of 3145921321 is about 1465.2642452210.

The spelling of 3145921321 in words is "three billion, one hundred forty-five million, nine hundred twenty-one thousand, three hundred twenty-one".