7221881 has 8 divisors (see below), whose sum is σ = 7656000. Its totient is φ = 6793200.

The previous prime is 7221871. The next prime is 7221911. The reversal of 7221881 is 1881227.

7221881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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-7221881 is a prime.

It is a super-2 number, since 2×7221881² = 104311130356322, which contains 22 as substring.

It is a Duffinian number.

7221881 is a modest number, since divided by 1881 gives 722 as remainder.

It is not an unprimeable number, because it can be changed into a prime (7221811) 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, 1556 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (957000).

Almost surely, 2^7221881 is an apocalyptic number.

It is an amenable number.

7221881 is a deficient number, since it is larger than the sum of its proper divisors (434119).

7221881 is a wasteful number, since it uses less digits than its factorization.

7221881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719.

The product of its digits is 1792, while the sum is 29.

The square root of 7221881 is about 2687.3557635713. The cubic root of 7221881 is about 193.2932890376.

The spelling of 7221881 in words is "seven million, two hundred twenty-one thousand, eight hundred eighty-one".