12225631 has 8 divisors (see below), whose sum is σ = 13647744. Its totient is φ = 10855320.

The previous prime is 12225613. The next prime is 12225641. The reversal of 12225631 is 13652221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12225631 - 2¹⁷ = 12094559 is a prime.

It is a super-2 number, since 2×12225631² = 298932106696322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12451 + ... + 13396.

It is an arithmetic number, because the mean of its divisors is an integer number (1705968).

Almost surely, 2^12225631 is an apocalyptic number.

12225631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12225631 is a deficient number, since it is larger than the sum of its proper divisors (1422113).

12225631 is a wasteful number, since it uses less digits than its factorization.

12225631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25901.

The product of its digits is 720, while the sum is 22.

The square root of 12225631 is about 3496.5169812257. The cubic root of 12225631 is about 230.3688536436.

Adding to 12225631 its reverse (13652221), we get a palindrome (25877852).

The spelling of 12225631 in words is "twelve million, two hundred twenty-five thousand, six hundred thirty-one".