13801224 has 32 divisors (see below), whose sum is σ = 34596000. Its totient is φ = 4588032.

The previous prime is 13801213. The next prime is 13801261. The reversal of 13801224 is 42210831.

It is a Cunningham number, because it is equal to 3715²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 13801224.

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, 14392 + ... + 15320.

It is an arithmetic number, because the mean of its divisors is an integer number (1081125).

Almost surely, 2^13801224 is an apocalyptic number.

It is an amenable number.

13801224 is an abundant number, since it is smaller than the sum of its proper divisors (20794776).

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

13801224 is a wasteful number, since it uses less digits than its factorization.

13801224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 13801224 is about 3714.9998654105. Note that the first 3 decimals coincide. The cubic root of 13801224 is about 239.8681219918.

The spelling of 13801224 in words is "thirteen million, eight hundred one thousand, two hundred twenty-four".