11531229 has 4 divisors (see below), whose sum is σ = 15374976. Its totient is φ = 7687484.

The previous prime is 11531207. The next prime is 11531231. The reversal of 11531229 is 92213511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11531229 - 2⁵ = 11531197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11531199 and 11531208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531239) 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, 1921869 + ... + 1921874.

It is an arithmetic number, because the mean of its divisors is an integer number (3843744).

Almost surely, 2^11531229 is an apocalyptic number.

It is an amenable number.

11531229 is a deficient number, since it is larger than the sum of its proper divisors (3843747).

11531229 is an equidigital number, since it uses as much as digits as its factorization.

11531229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843746.

The product of its digits is 540, while the sum is 24.

The square root of 11531229 is about 3395.7663347174. The cubic root of 11531229 is about 225.9220043072.

The spelling of 11531229 in words is "eleven million, five hundred thirty-one thousand, two hundred twenty-nine".