7278482221 has 8 divisors (see below), whose sum is σ = 7821653760. Its totient is φ = 6748091328.

The previous prime is 7278482207. The next prime is 7278482243. The reversal of 7278482221 is 1222848727.

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

It is a cyclic number.

It is not a de Polignac number, because 7278482221 - 2⁷ = 7278482093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278482261) 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, 3193981 + ... + 3196258.

It is an arithmetic number, because the mean of its divisors is an integer number (977706720).

Almost surely, 2^7278482221 is an apocalyptic number.

It is an amenable number.

7278482221 is a deficient number, since it is larger than the sum of its proper divisors (543171539).

7278482221 is a wasteful number, since it uses less digits than its factorization.

7278482221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390323.

The product of its digits is 200704, while the sum is 43.

The square root of 7278482221 is about 85314.0212450451. The cubic root of 7278482221 is about 1937.9695180451.

The spelling of 7278482221 in words is "seven billion, two hundred seventy-eight million, four hundred eighty-two thousand, two hundred twenty-one".