3165106921 has 4 divisors (see below), whose sum is σ = 3165466500. Its totient is φ = 3164747344.

The previous prime is 3165106909. The next prime is 3165106927. The reversal of 3165106921 is 1296015613.

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 1602881296 + 1562225625 = 40036^2 + 39525^2 .

It is a cyclic number.

It is not a de Polignac number, because 3165106921 - 2⁹ = 3165106409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3165106927) 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, 166246 + ... + 184303.

It is an arithmetic number, because the mean of its divisors is an integer number (791366625).

Almost surely, 2^3165106921 is an apocalyptic number.

It is an amenable number.

3165106921 is a deficient number, since it is larger than the sum of its proper divisors (359579).

3165106921 is an equidigital number, since it uses as much as digits as its factorization.

3165106921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359578.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 3165106921 is about 56259.2829762342. The cubic root of 3165106921 is about 1468.2368793217.

The spelling of 3165106921 in words is "three billion, one hundred sixty-five million, one hundred six thousand, nine hundred twenty-one".