12231567 has 10 divisors (see below), whose sum is σ = 18271968. Its totient is φ = 8154324.

The previous prime is 12231563. The next prime is 12231589. The reversal of 12231567 is 76513221.

It is a happy number.

It is not a de Polignac number, because 12231567 - 2² = 12231563 is a prime.

It is a super-2 number, since 2×12231567² = 299222462550978, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12231567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231563) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 75423 + ... + 75584.

Almost surely, 2^12231567 is an apocalyptic number.

12231567 is a deficient number, since it is larger than the sum of its proper divisors (6040401).

12231567 is an equidigital number, since it uses as much as digits as its factorization.

12231567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151019 (or 151010 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12231567 is about 3497.3657229406. The cubic root of 12231567 is about 230.4061318355.

Adding to 12231567 its reverse (76513221), we get a palindrome (88744788).

The spelling of 12231567 in words is "twelve million, two hundred thirty-one thousand, five hundred sixty-seven".