7220291 has 16 divisors (see below), whose sum is σ = 8465184. Its totient is φ = 6096384.

The previous prime is 7220263. The next prime is 7220299. The reversal of 7220291 is 1920227.

It is a cyclic number.

It is not a de Polignac number, because 7220291 - 2²² = 3025987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7220299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7736 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (529074).

Almost surely, 2^7220291 is an apocalyptic number.

7220291 is a deficient number, since it is larger than the sum of its proper divisors (1244893).

7220291 is a wasteful number, since it uses less digits than its factorization.

7220291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 7220291 is about 2687.0599174563. The cubic root of 7220291 is about 193.2791025725.

The spelling of 7220291 in words is "seven million, two hundred twenty thousand, two hundred ninety-one".