7282221491 has 4 divisors (see below), whose sum is σ = 7390911432. Its totient is φ = 7173531552.

The previous prime is 7282221481. The next prime is 7282221493. The reversal of 7282221491 is 1941222827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7282221491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7282221493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54344870 + ... + 54345003.

It is an arithmetic number, because the mean of its divisors is an integer number (1847727858).

Almost surely, 2^7282221491 is an apocalyptic number.

7282221491 is a deficient number, since it is larger than the sum of its proper divisors (108689941).

7282221491 is a wasteful number, since it uses less digits than its factorization.

7282221491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108689940.

The product of its digits is 32256, while the sum is 38.

The square root of 7282221491 is about 85335.9331758902. The cubic root of 7282221491 is about 1938.3013340498.

The spelling of 7282221491 in words is "seven billion, two hundred eighty-two million, two hundred twenty-one thousand, four hundred ninety-one".