7671442221 has 12 divisors (see below), whose sum is σ = 11083182240. Its totient is φ = 5113274760.

The previous prime is 7671442217. The next prime is 7671442237. The reversal of 7671442221 is 1222441767.

7671442221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7671442221 - 2² = 7671442217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7671442211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35881 + ... + 128958.

It is an arithmetic number, because the mean of its divisors is an integer number (923598520).

Almost surely, 2^7671442221 is an apocalyptic number.

It is an amenable number.

7671442221 is a deficient number, since it is larger than the sum of its proper divisors (3411740019).

7671442221 is a wasteful number, since it uses less digits than its factorization.

7671442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170016 (or 170013 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 7671442221 is about 87586.7696687120. The cubic root of 7671442221 is about 1972.2365642586.

Adding to 7671442221 its reverse (1222441767), we get a palindrome (8893883988).

The spelling of 7671442221 in words is "seven billion, six hundred seventy-one million, four hundred forty-two thousand, two hundred twenty-one".