230312540 has 24 divisors (see below), whose sum is σ = 485105712. Its totient is φ = 91848960.

The previous prime is 230312521. The next prime is 230312543. The reversal of 230312540 is 45213032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230312543) 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, 10346 + ... + 23825.

It is an arithmetic number, because the mean of its divisors is an integer number (20212738).

Almost surely, 2^230312540 is an apocalyptic number.

230312540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230312540 is an abundant number, since it is smaller than the sum of its proper divisors (254793172).

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

230312540 is a wasteful number, since it uses less digits than its factorization.

230312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34517 (or 34515 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 230312540 is about 15176.0515286421. The cubic root of 230312540 is about 612.9699650060.

Adding to 230312540 its reverse (45213032), we get a palindrome (275525572).

The spelling of 230312540 in words is "two hundred thirty million, three hundred twelve thousand, five hundred forty".