7910221 has 8 divisors (see below), whose sum is σ = 8758944. Its totient is φ = 7083120.

The previous prime is 7910159. The next prime is 7910233. The reversal of 7910221 is 1220197.

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

It is not a de Polignac number, because 7910221 - 2¹³ = 7902029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7910192 and 7910201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7910281) 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, 4630 + ... + 6103.

It is an arithmetic number, because the mean of its divisors is an integer number (1094868).

Almost surely, 2^7910221 is an apocalyptic number.

It is an amenable number.

7910221 is a deficient number, since it is larger than the sum of its proper divisors (848723).

7910221 is a wasteful number, since it uses less digits than its factorization.

7910221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 7910221 is about 2812.5115110876. The cubic root of 7910221 is about 199.2490253816.

The spelling of 7910221 in words is "seven million, nine hundred ten thousand, two hundred twenty-one".