12213536 has 12 divisors (see below), whose sum is σ = 24045462. Its totient is φ = 6106752.

The previous prime is 12213527. The next prime is 12213541. The reversal of 12213536 is 63531221.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 1690000 = 3244^2 + 1300^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190805 + ... + 190868.

Almost surely, 2^12213536 is an apocalyptic number.

12213536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12213536 is a deficient number, since it is larger than the sum of its proper divisors (11831926).

12213536 is an equidigital number, since it uses as much as digits as its factorization.

12213536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381683 (or 381675 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 12213536 is about 3494.7869749099. The cubic root of 12213536 is about 230.2928594574.

Adding to 12213536 its reverse (63531221), we get a palindrome (75744757).

The spelling of 12213536 in words is "twelve million, two hundred thirteen thousand, five hundred thirty-six".