12231552 has 64 divisors (see below), whose sum is σ = 33158160. Its totient is φ = 3993600.

The previous prime is 12231547. The next prime is 12231563. The reversal of 12231552 is 25513221.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×12231552² = 299221728657408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20052 + ... + 20652.

Almost surely, 2^12231552 is an apocalyptic number.

12231552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12231552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16579080).

12231552 is an abundant number, since it is smaller than the sum of its proper divisors (20926608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12231552 is an equidigital number, since it uses as much as digits as its factorization.

12231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 659 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 12231552 is about 3497.3635784688. The cubic root of 12231552 is about 230.4060376504.

Adding to 12231552 its reverse (25513221), we get a palindrome (37744773).

It can be divided in two parts, 1223 and 1552, that added together give a triangular number (2775 = T₇₄).

The spelling of 12231552 in words is "twelve million, two hundred thirty-one thousand, five hundred fifty-two".