11813229 has 8 divisors (see below), whose sum is σ = 17501120. Its totient is φ = 7875468.

The previous prime is 11813227. The next prime is 11813233. The reversal of 11813229 is 92231811.

It is not a de Polignac number, because 11813229 - 2¹ = 11813227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 437527 = 11813229 / (1 + 1 + 8 + 1 + 3 + 2 + 2 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813227) 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 7 ways as a sum of consecutive naturals, for example, 218737 + ... + 218790.

It is an arithmetic number, because the mean of its divisors is an integer number (2187640).

Almost surely, 2^11813229 is an apocalyptic number.

It is an amenable number.

11813229 is a deficient number, since it is larger than the sum of its proper divisors (5687891).

11813229 is an equidigital number, since it uses as much as digits as its factorization.

11813229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437536 (or 437530 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 11813229 is about 3437.0378234753. The cubic root of 11813229 is about 227.7488578173.

The spelling of 11813229 in words is "eleven million, eight hundred thirteen thousand, two hundred twenty-nine".