218416001 has 4 divisors (see below), whose sum is σ = 229911600. Its totient is φ = 206920404.

The previous prime is 218415947. The next prime is 218416019. The reversal of 218416001 is 100614812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 218416001 - 2⁶ = 218415937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218416301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747771 + ... + 5747808.

It is an arithmetic number, because the mean of its divisors is an integer number (57477900).

Almost surely, 2^218416001 is an apocalyptic number.

It is an amenable number.

218416001 is a deficient number, since it is larger than the sum of its proper divisors (11495599).

218416001 is a wasteful number, since it uses less digits than its factorization.

218416001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495598.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 218416001 is about 14778.9039174088. The cubic root of 218416001 is about 602.2287488431.

The spelling of 218416001 in words is "two hundred eighteen million, four hundred sixteen thousand, one".