7228165691 has 4 divisors (see below), whose sum is σ = 7228365984. Its totient is φ = 7227965400.

The previous prime is 7228165613. The next prime is 7228165717. The reversal of 7228165691 is 1965618227.

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 7228165691 - 2¹⁸ = 7227903547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7228165601) 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, 29315 + ... + 123756.

It is an arithmetic number, because the mean of its divisors is an integer number (1807091496).

Almost surely, 2^7228165691 is an apocalyptic number.

7228165691 is a deficient number, since it is larger than the sum of its proper divisors (200293).

7228165691 is a wasteful number, since it uses less digits than its factorization.

7228165691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200292.

The product of its digits is 362880, while the sum is 47.

The square root of 7228165691 is about 85018.6196723988. The cubic root of 7228165691 is about 1933.4934259588.

The spelling of 7228165691 in words is "seven billion, two hundred twenty-eight million, one hundred sixty-five thousand, six hundred ninety-one".