6308161221 has 4 divisors (see below), whose sum is σ = 8410881632. Its totient is φ = 4205440812.

The previous prime is 6308161207. The next prime is 6308161241. The reversal of 6308161221 is 1221618036.

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 not a de Polignac number, because 6308161221 - 2¹⁰ = 6308160197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6308161241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051360201 + ... + 1051360206.

It is an arithmetic number, because the mean of its divisors is an integer number (2102720408).

Almost surely, 2^6308161221 is an apocalyptic number.

It is an amenable number.

6308161221 is a deficient number, since it is larger than the sum of its proper divisors (2102720411).

6308161221 is a wasteful number, since it uses less digits than its factorization.

6308161221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102720410.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6308161221 is about 79423.9335528026. The cubic root of 6308161221 is about 1847.7119237500.

Adding to 6308161221 its reverse (1221618036), we get a palindrome (7529779257).

The spelling of 6308161221 in words is "six billion, three hundred eight million, one hundred sixty-one thousand, two hundred twenty-one".