218030073 has 8 divisors (see below), whose sum is σ = 306007200. Its totient is φ = 137703168.

The previous prime is 218030053. The next prime is 218030107. The reversal of 218030073 is 370030812.

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

It is not a de Polignac number, because 218030073 - 2⁶ = 218030009 is a prime.

It is a super-2 number, since 2×218030073² = 95074225464770658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218030003) 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, 1912488 + ... + 1912601.

It is an arithmetic number, because the mean of its divisors is an integer number (38250900).

Almost surely, 2^218030073 is an apocalyptic number.

It is an amenable number.

218030073 is a deficient number, since it is larger than the sum of its proper divisors (87977127).

218030073 is a wasteful number, since it uses less digits than its factorization.

218030073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825111.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 218030073 is about 14765.8414253980. The cubic root of 218030073 is about 601.8738390090.

Adding to 218030073 its reverse (370030812), we get a palindrome (588060885).

The spelling of 218030073 in words is "two hundred eighteen million, thirty thousand, seventy-three".