2221291 has 4 divisors (see below), whose sum is σ = 2259000. Its totient is φ = 2183584.

The previous prime is 2221273. The next prime is 2221301. The reversal of 2221291 is 1921222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221291 - 2⁵ = 2221259 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18766 + ... + 18883.

It is an arithmetic number, because the mean of its divisors is an integer number (564750).

2^2221291 is an apocalyptic number.

2221291 is a deficient number, since it is larger than the sum of its proper divisors (37709).

2221291 is an equidigital number, since it uses as much as digits as its factorization.

2221291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37708.

The product of its digits is 144, while the sum is 19.

The square root of 2221291 is about 1490.3996108427. The cubic root of 2221291 is about 130.4773574335.

The spelling of 2221291 in words is "two million, two hundred twenty-one thousand, two hundred ninety-one".