218051 has 8 divisors (see below), whose sum is σ = 230880. Its totient is φ = 205632.

The previous prime is 218047. The next prime is 218069. The reversal of 218051 is 150812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218051 - 2² = 218047 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218051.

It is not an unprimeable number, because it can be changed into a prime (218021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (28860).

2²¹⁸⁰⁵¹ is an apocalyptic number.

218051 is a deficient number, since it is larger than the sum of its proper divisors (12829).

218051 is a wasteful number, since it uses less digits than its factorization.

218051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 218051 is about 466.9593130027. The cubic root of 218051 is about 60.1893094779.

Adding to 218051 its reverse (150812), we get a palindrome (368863).

It can be divided in two parts, 21 and 8051, that multiplied together give a triangular number (169071 = T₅₈₁).

The spelling of 218051 in words is "two hundred eighteen thousand, fifty-one".