11222591 has 4 divisors (see below), whose sum is σ = 11434392. Its totient is φ = 11010792.

The previous prime is 11222579. The next prime is 11222599. The reversal of 11222591 is 19522211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19522211 = 613 ⋅31847.

It is a cyclic number.

It is not a de Polignac number, because 11222591 - 2¹⁴ = 11206207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222599) 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, 105821 + ... + 105926.

It is an arithmetic number, because the mean of its divisors is an integer number (2858598).

Almost surely, 2^11222591 is an apocalyptic number.

11222591 is a deficient number, since it is larger than the sum of its proper divisors (211801).

11222591 is an equidigital number, since it uses as much as digits as its factorization.

11222591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211800.

The product of its digits is 360, while the sum is 23.

The square root of 11222591 is about 3350.0135820620. The cubic root of 11222591 is about 223.8881177558. Note that the first 3 decimals are identical.

The spelling of 11222591 in words is "eleven million, two hundred twenty-two thousand, five hundred ninety-one".