12533631 has 16 divisors (see below), whose sum is σ = 18620928. Its totient is φ = 7433600.

The previous prime is 12533629. The next prime is 12533657. The reversal of 12533631 is 13633521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12533631 - 2¹ = 12533629 is a prime.

It is a super-2 number, since 2×12533631² = 314183812088322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533671) 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, 2490 + ... + 5591.

It is an arithmetic number, because the mean of its divisors is an integer number (1163808).

Almost surely, 2^12533631 is an apocalyptic number.

12533631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12533631 is a deficient number, since it is larger than the sum of its proper divisors (6087297).

12533631 is a wasteful number, since it uses less digits than its factorization.

12533631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142.

The product of its digits is 1620, while the sum is 24.

The square root of 12533631 is about 3540.2868527847. The cubic root of 12533631 is about 232.2873903302.

It can be divided in two parts, 1253 and 3631, that added together give a palindrome (4884).

The spelling of 12533631 in words is "twelve million, five hundred thirty-three thousand, six hundred thirty-one".