13623216 has 20 divisors (see below), whose sum is σ = 35193432. Its totient is φ = 4541056.

The previous prime is 13623179. The next prime is 13623223. The reversal of 13623216 is 61232631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141861 + ... + 141956.

Almost surely, 2^13623216 is an apocalyptic number.

13623216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13623216 is an abundant number, since it is smaller than the sum of its proper divisors (21570216).

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

13623216 is a wasteful number, since it uses less digits than its factorization.

13623216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283828 (or 283822 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 13623216 is about 3690.9641016948. The cubic root of 13623216 is about 238.8323842403.

Adding to 13623216 its reverse (61232631), we get a palindrome (74855847).

It can be divided in two parts, 136232 and 16, that multiplied together give a palindrome (2179712).

The spelling of 13623216 in words is "thirteen million, six hundred twenty-three thousand, two hundred sixteen".