218433601 has 4 divisors (see below), whose sum is σ = 221693872. Its totient is φ = 215173332.

The previous prime is 218433587. The next prime is 218433641. The reversal of 218433601 is 106334812.

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 218433601 - 2⁵ = 218433569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218433601.

It is not an unprimeable number, because it can be changed into a prime (218433641) 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, 1630035 + ... + 1630168.

It is an arithmetic number, because the mean of its divisors is an integer number (55423468).

Almost surely, 2^218433601 is an apocalyptic number.

It is an amenable number.

218433601 is a deficient number, since it is larger than the sum of its proper divisors (3260271).

218433601 is an equidigital number, since it uses as much as digits as its factorization.

218433601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260270.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 218433601 is about 14779.4993487601. The cubic root of 218433601 is about 602.2449243083.

The spelling of 218433601 in words is "two hundred eighteen million, four hundred thirty-three thousand, six hundred one".