3161144221 has 8 divisors (see below), whose sum is σ = 3185787704. Its totient is φ = 3136596480.

The previous prime is 3161144213. The next prime is 3161144267. The reversal of 3161144221 is 1224411613.

It can be written as a sum of positive squares in 4 ways, for example, as 23912100 + 3137232121 = 4890^2 + 56011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3161144221 - 2³ = 3161144213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161144521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43081 + ... + 90433.

It is an arithmetic number, because the mean of its divisors is an integer number (398223463).

Almost surely, 2^3161144221 is an apocalyptic number.

It is an amenable number.

3161144221 is a deficient number, since it is larger than the sum of its proper divisors (24643483).

3161144221 is a wasteful number, since it uses less digits than its factorization.

3161144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47871.

The product of its digits is 1152, while the sum is 25.

The square root of 3161144221 is about 56224.0537581559. The cubic root of 3161144221 is about 1467.6238813799.

Adding to 3161144221 its reverse (1224411613), we get a palindrome (4385555834).

The spelling of 3161144221 in words is "three billion, one hundred sixty-one million, one hundred forty-four thousand, two hundred twenty-one".