7221901671 has 6 divisors (see below), whose sum is σ = 10431635760. Its totient is φ = 4814601108.

The previous prime is 7221901669. The next prime is 7221901679. The reversal of 7221901671 is 1761091227.

It is a happy number.

It is not a de Polignac number, because 7221901671 - 2¹ = 7221901669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221901679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401216751 + ... + 401216768.

It is an arithmetic number, because the mean of its divisors is an integer number (1738605960).

Almost surely, 2^7221901671 is an apocalyptic number.

7221901671 is a deficient number, since it is larger than the sum of its proper divisors (3209734089).

7221901671 is a wasteful number, since it uses less digits than its factorization.

7221901671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802433525 (or 802433522 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 7221901671 is about 84981.7725809482. The cubic root of 7221901671 is about 1932.9347345685.

Adding to 7221901671 its reverse (1761091227), we get a palindrome (8982992898).

The spelling of 7221901671 in words is "seven billion, two hundred twenty-one million, nine hundred one thousand, six hundred seventy-one".