13957218 has 32 divisors (see below), whose sum is σ = 33837120. Its totient is φ = 4229280.

The previous prime is 13957213. The next prime is 13957219. The reversal of 13957218 is 81275931.

13957218 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13957211) 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, 11155 + ... + 12342.

It is an arithmetic number, because the mean of its divisors is an integer number (1057410).

Almost surely, 2^13957218 is an apocalyptic number.

13957218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13957218 is an abundant number, since it is smaller than the sum of its proper divisors (19879902).

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

13957218 is a wasteful number, since it uses less digits than its factorization.

13957218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23519 (or 23513 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13957218 is about 3735.9360272895. The cubic root of 13957218 is about 240.7684742376.

The spelling of 13957218 in words is "thirteen million, nine hundred fifty-seven thousand, two hundred eighteen".