218007801 has 32 divisors (see below), whose sum is σ = 353802240. Its totient is φ = 131576400.

The previous prime is 218007799. The next prime is 218007821. The reversal of 218007801 is 108700812.

It is not a de Polignac number, because 218007801 - 2¹ = 218007799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218007821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76716 + ... + 79506.

It is an arithmetic number, because the mean of its divisors is an integer number (11056320).

Almost surely, 2^218007801 is an apocalyptic number.

It is an amenable number.

218007801 is a deficient number, since it is larger than the sum of its proper divisors (135794439).

218007801 is a wasteful number, since it uses less digits than its factorization.

218007801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 218007801 is about 14765.0872330644. The cubic root of 218007801 is about 601.8533442971.

The spelling of 218007801 in words is "two hundred eighteen million, seven thousand, eight hundred one".