815140230 has 32 divisors (see below), whose sum is σ = 1957215744. Its totient is φ = 217273056.

The previous prime is 815140219. The next prime is 815140237. The reversal of 815140230 is 32041518.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 815140230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815140237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83169 + ... + 92451.

It is an arithmetic number, because the mean of its divisors is an integer number (61162992).

Almost surely, 2^815140230 is an apocalyptic number.

815140230 is an abundant number, since it is smaller than the sum of its proper divisors (1142075514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815140230 is a wasteful number, since it uses less digits than its factorization.

815140230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12220.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 815140230 is about 28550.6607629316. The cubic root of 815140230 is about 934.1374335987.

Adding to 815140230 its reverse (32041518), we get a palindrome (847181748).

The spelling of 815140230 in words is "eight hundred fifteen million, one hundred forty thousand, two hundred thirty".