218488401 has 16 divisors (see below), whose sum is σ = 326020800. Its totient is φ = 144608544.

The previous prime is 218488399. The next prime is 218488409. The reversal of 218488401 is 104884812.

It is a happy number.

218488401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218488401 - 2¹ = 218488399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218488409) 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, 25356 + ... + 32861.

It is an arithmetic number, because the mean of its divisors is an integer number (20376300).

Almost surely, 2^218488401 is an apocalyptic number.

It is an amenable number.

218488401 is a deficient number, since it is larger than the sum of its proper divisors (107532399).

218488401 is a wasteful number, since it uses less digits than its factorization.

218488401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58365 (or 58359 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 218488401 is about 14781.3531518599. The cubic root of 218488401 is about 602.2952832613.

The spelling of 218488401 in words is "two hundred eighteen million, four hundred eighty-eight thousand, four hundred one".