13251224 has 32 divisors (see below), whose sum is σ = 29061120. Its totient is φ = 5546016.

The previous prime is 13251169. The next prime is 13251233. The reversal of 13251224 is 42215231.

It is a junction number, because it is equal to n+sod(n) for n = 13251196 and 13251205.

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, 344 + ... + 5159.

It is an arithmetic number, because the mean of its divisors is an integer number (908160).

Almost surely, 2^13251224 is an apocalyptic number.

13251224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13251224 is an abundant number, since it is smaller than the sum of its proper divisors (15809896).

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

13251224 is a wasteful number, since it uses less digits than its factorization.

13251224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5559 (or 5555 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 13251224 is about 3640.2230700879. The cubic root of 13251224 is about 236.6384607881.

Adding to 13251224 its reverse (42215231), we get a palindrome (55466455).

The spelling of 13251224 in words is "thirteen million, two hundred fifty-one thousand, two hundred twenty-four".