218057 has 4 divisors (see below), whose sum is σ = 249216. Its totient is φ = 186900.

The previous prime is 218047. The next prime is 218069. The reversal of 218057 is 750812.

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 not a de Polignac number, because 218057 - 2¹⁰ = 217033 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 218057.

It is not an unprimeable number, because it can be changed into a prime (218047) 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, 15569 + ... + 15582.

It is an arithmetic number, because the mean of its divisors is an integer number (62304).

2²¹⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

218057 is a deficient number, since it is larger than the sum of its proper divisors (31159).

218057 is an equidigital number, since it uses as much as digits as its factorization.

218057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31158.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 218057 is about 466.9657375012. The cubic root of 218057 is about 60.1898615392.

Adding to 218057 its reverse (750812), we get a palindrome (968869).

It can be divided in two parts, 21805 and 7, that added together give a palindrome (21812).

The spelling of 218057 in words is "two hundred eighteen thousand, fifty-seven".