218750023 has 4 divisors (see below), whose sum is σ = 220014648. Its totient is φ = 217485400.

The previous prime is 218750017. The next prime is 218750039. The reversal of 218750023 is 320057812.

218750023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218750023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218749973 and 218750000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218756023) 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, 632053 + ... + 632398.

It is an arithmetic number, because the mean of its divisors is an integer number (55003662).

Almost surely, 2^218750023 is an apocalyptic number.

218750023 is a deficient number, since it is larger than the sum of its proper divisors (1264625).

218750023 is a wasteful number, since it uses less digits than its factorization.

218750023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264624.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 218750023 is about 14790.2002352909. The cubic root of 218750023 is about 602.5355871612.

The spelling of 218750023 in words is "two hundred eighteen million, seven hundred fifty thousand, twenty-three".