7229159891 has 4 divisors (see below), whose sum is σ = 7266616872. Its totient is φ = 7191702912.

The previous prime is 7229159869. The next prime is 7229159897. The reversal of 7229159891 is 1989519227.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7229159891 - 2⁶ = 7229159827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7229159897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18728201 + ... + 18728586.

It is an arithmetic number, because the mean of its divisors is an integer number (1816654218).

Almost surely, 2^7229159891 is an apocalyptic number.

7229159891 is a deficient number, since it is larger than the sum of its proper divisors (37456981).

7229159891 is a wasteful number, since it uses less digits than its factorization.

7229159891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37456980.

The product of its digits is 816480, while the sum is 53.

The square root of 7229159891 is about 85024.4664258471. The cubic root of 7229159891 is about 1933.5820695197.

The spelling of 7229159891 in words is "seven billion, two hundred twenty-nine million, one hundred fifty-nine thousand, eight hundred ninety-one".