230640220516 has 12 divisors (see below), whose sum is σ = 403847534188. Its totient is φ = 115255210752.

The previous prime is 230640220513. The next prime is 230640220541. The reversal of 230640220516 is 615022046032.

It can be written as a sum of positive squares in 2 ways, for example, as 115919820900 + 114720399616 = 340470^2 + 338704^2 .

It is a super-2 number, since 2×230640220516² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (230640220513) 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, 16216881 + ... + 16231096.

Almost surely, 2^230640220516 is an apocalyptic number.

It is an amenable number.

230640220516 is a deficient number, since it is larger than the sum of its proper divisors (173207313672).

230640220516 is a wasteful number, since it uses less digits than its factorization.

230640220516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32449758 (or 32449756 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 230640220516 its reverse (615022046032), we get a palindrome (845662266548).

The spelling of 230640220516 in words is "two hundred thirty billion, six hundred forty million, two hundred twenty thousand, five hundred sixteen".