11229813 has 16 divisors (see below), whose sum is σ = 19013760. Its totient is φ = 6416928.

The previous prime is 11229793. The next prime is 11229847. The reversal of 11229813 is 31892211.

It is not a de Polignac number, because 11229813 - 2⁶ = 11229749 is a prime.

It is a super-2 number, since 2×11229813² = 252217400029938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11229853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29520 + ... + 29897.

It is an arithmetic number, because the mean of its divisors is an integer number (1188360).

Almost surely, 2^11229813 is an apocalyptic number.

It is an amenable number.

11229813 is a deficient number, since it is larger than the sum of its proper divisors (7783947).

11229813 is an equidigital number, since it uses as much as digits as its factorization.

11229813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59433 (or 59427 counting only the distinct ones).

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

The square root of 11229813 is about 3351.0913147809. The cubic root of 11229813 is about 223.9361332057.

The spelling of 11229813 in words is "eleven million, two hundred twenty-nine thousand, eight hundred thirteen".