7830221 has 8 divisors (see below), whose sum is σ = 9167424. Its totient is φ = 6547680.

The previous prime is 7830211. The next prime is 7830239. The reversal of 7830221 is 1220387.

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 7830221 - 2⁶ = 7830157 is a prime.

It is a super-2 number, since 2×7830221² = 122624721817682, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7830211) 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, 13355 + ... + 13928.

It is an arithmetic number, because the mean of its divisors is an integer number (1145928).

Almost surely, 2^7830221 is an apocalyptic number.

It is an amenable number.

7830221 is a deficient number, since it is larger than the sum of its proper divisors (1337203).

7830221 is a wasteful number, since it uses less digits than its factorization.

7830221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27331.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 7830221 is about 2798.2532051264. The cubic root of 7830221 is about 198.5750466511.

The spelling of 7830221 in words is "seven million, eight hundred thirty thousand, two hundred twenty-one".