11912231 has 4 divisors (see below), whose sum is σ = 11919312. Its totient is φ = 11905152.

The previous prime is 11912191. The next prime is 11912237. The reversal of 11912231 is 13221911.

11912231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11912231 is a prime.

It is a super-2 number, since 2×11912231² = 283802494794722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11912237) 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, 590 + ... + 4916.

It is an arithmetic number, because the mean of its divisors is an integer number (2979828).

Almost surely, 2^11912231 is an apocalyptic number.

11912231 is a deficient number, since it is larger than the sum of its proper divisors (7081).

11912231 is an equidigital number, since it uses as much as digits as its factorization.

11912231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080.

The product of its digits is 108, while the sum is 20.

The square root of 11912231 is about 3451.4100017239. The cubic root of 11912231 is about 228.3833130982.

The spelling of 11912231 in words is "eleven million, nine hundred twelve thousand, two hundred thirty-one".