12231609 has 16 divisors (see below), whose sum is σ = 17939712. Its totient is φ = 7365888.

The previous prime is 12231599. The next prime is 12231613. The reversal of 12231609 is 90613221.

12231609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12231609 - 2¹³ = 12223417 is a prime.

It is a super-2 number, since 2×12231609² = 299224517457762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12231629) 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, 1504 + ... + 5169.

It is an arithmetic number, because the mean of its divisors is an integer number (1121232).

Almost surely, 2^12231609 is an apocalyptic number.

It is an amenable number.

12231609 is a deficient number, since it is larger than the sum of its proper divisors (5708103).

12231609 is a wasteful number, since it uses less digits than its factorization.

12231609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12231609 is about 3497.3717274548. The cubic root of 12231609 is about 230.4063955533.

The spelling of 12231609 in words is "twelve million, two hundred thirty-one thousand, six hundred nine".