7221159 has 36 divisors (see below), whose sum is σ = 12103000. Its totient is φ = 4134240.

The previous prime is 7221157. The next prime is 7221161. The reversal of 7221159 is 9511227.

It is an interprime number because it is at equal distance from previous prime (7221157) and next prime (7221161).

It is not a de Polignac number, because 7221159 - 2¹ = 7221157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221157) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20517 + ... + 20865.

Almost surely, 2^7221159 is an apocalyptic number.

7221159 is a deficient number, since it is larger than the sum of its proper divisors (4881841).

7221159 is a wasteful number, since it uses less digits than its factorization.

7221159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 382 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 7221159 is about 2687.2214274228. The cubic root of 7221159 is about 193.2868473914.

It can be divided in two parts, 722 and 1159, that added together give a palindrome (1881).

The spelling of 7221159 in words is "seven million, two hundred twenty-one thousand, one hundred fifty-nine".