7226711921 has 24 divisors (see below), whose sum is σ = 8986119840. Its totient is φ = 5745168000.

The previous prime is 7226711851. The next prime is 7226711953. The reversal of 7226711921 is 1291176227.

It is a happy number.

It is not a de Polignac number, because 7226711921 - 2¹⁴ = 7226695537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7226711981) 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 23 ways as a sum of consecutive naturals, for example, 66980 + ... + 137621.

It is an arithmetic number, because the mean of its divisors is an integer number (374421660).

Almost surely, 2^7226711921 is an apocalyptic number.

It is an amenable number.

7226711921 is a deficient number, since it is larger than the sum of its proper divisors (1759407919).

7226711921 is a wasteful number, since it uses less digits than its factorization.

7226711921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204657 (or 204644 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 7226711921 is about 85010.0695270860. The cubic root of 7226711921 is about 1933.3637921843.

The spelling of 7226711921 in words is "seven billion, two hundred twenty-six million, seven hundred eleven thousand, nine hundred twenty-one".