218426113 has 4 divisors (see below), whose sum is σ = 218507220. Its totient is φ = 218345008.

The previous prime is 218426069. The next prime is 218426119. The reversal of 218426113 is 311624812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124277904 + 94148209 = 11148^2 + 9703^2 .

It is a cyclic number.

It is not a de Polignac number, because 218426113 - 2¹⁷ = 218295041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218426119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36370 + ... + 41947.

It is an arithmetic number, because the mean of its divisors is an integer number (54626805).

Almost surely, 2^218426113 is an apocalyptic number.

It is an amenable number.

218426113 is a deficient number, since it is larger than the sum of its proper divisors (81107).

218426113 is an equidigital number, since it uses as much as digits as its factorization.

218426113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81106.

The product of its digits is 2304, while the sum is 28.

The square root of 218426113 is about 14779.2460227171. The cubic root of 218426113 is about 602.2380424893.

The spelling of 218426113 in words is "two hundred eighteen million, four hundred twenty-six thousand, one hundred thirteen".