7221899 has 8 divisors (see below), whose sum is σ = 7531920. Its totient is φ = 6916000.

The previous prime is 7221871. The next prime is 7221911. The reversal of 7221899 is 9981227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7221899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2849 + ... + 4749.

It is an arithmetic number, because the mean of its divisors is an integer number (941490).

Almost surely, 2^7221899 is an apocalyptic number.

7221899 is a deficient number, since it is larger than the sum of its proper divisors (310021).

7221899 is a wasteful number, since it uses less digits than its factorization.

7221899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061.

The product of its digits is 18144, while the sum is 38.

The square root of 7221899 is about 2687.3591125862. The cubic root of 7221899 is about 193.2934496272.

The spelling of 7221899 in words is "seven million, two hundred twenty-one thousand, eight hundred ninety-nine".