7221903 has 8 divisors (see below), whose sum is σ = 10369968. Its totient is φ = 4444224.

The previous prime is 7221871. The next prime is 7221911. The reversal of 7221903 is 3091227.

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

It is not a de Polignac number, because 7221903 - 2⁵ = 7221871 is a prime.

7221903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92550 + ... + 92627.

It is an arithmetic number, because the mean of its divisors is an integer number (1296246).

Almost surely, 2^7221903 is an apocalyptic number.

7221903 is a deficient number, since it is larger than the sum of its proper divisors (3148065).

7221903 is a wasteful number, since it uses less digits than its factorization.

7221903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185193.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 7221903 is about 2687.3598568111. The cubic root of 7221903 is about 193.2934853137.

The spelling of 7221903 in words is "seven million, two hundred twenty-one thousand, nine hundred three".