11218491 has 6 divisors (see below), whose sum is σ = 16204500. Its totient is φ = 7478988.

The previous prime is 11218489. The next prime is 11218517. The reversal of 11218491 is 19481211.

It is not a de Polignac number, because 11218491 - 2¹ = 11218489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11214491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623241 + ... + 623258.

It is an arithmetic number, because the mean of its divisors is an integer number (2700750).

Almost surely, 2^11218491 is an apocalyptic number.

11218491 is a deficient number, since it is larger than the sum of its proper divisors (4986009).

11218491 is a wasteful number, since it uses less digits than its factorization.

11218491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246505 (or 1246502 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 11218491 is about 3349.4015883438. The cubic root of 11218491 is about 223.8608497482.

The spelling of 11218491 in words is "eleven million, two hundred eighteen thousand, four hundred ninety-one".