7636221 has 16 divisors (see below), whose sum is σ = 11393920. Its totient is φ = 5054400.

The previous prime is 7636177. The next prime is 7636229. The reversal of 7636221 is 1226367.

It is a happy number.

7636221 is a `hidden beast` number, since 7 + 636 + 2 + 21 = 666.

7636221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7636221 - 2⁷ = 7636093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7636229) 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 15 ways as a sum of consecutive naturals, for example, 3141 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (712120).

Almost surely, 2^7636221 is an apocalyptic number.

It is an amenable number.

7636221 is a deficient number, since it is larger than the sum of its proper divisors (3757699).

7636221 is a wasteful number, since it uses less digits than its factorization.

7636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2027 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 7636221 is about 2763.3713105553. The cubic root of 7636221 is about 196.9213614173.

The spelling of 7636221 in words is "seven million, six hundred thirty-six thousand, two hundred twenty-one".