230285921 has 4 divisors (see below), whose sum is σ = 230506500. Its totient is φ = 230065344.

The previous prime is 230285899. The next prime is 230285929. The reversal of 230285921 is 129582032.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 129504400 + 100781521 = 11380^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 230285921 - 2¹⁸ = 230023777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (230285929) 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, 108716 + ... + 110813.

It is an arithmetic number, because the mean of its divisors is an integer number (57626625).

Almost surely, 2^230285921 is an apocalyptic number.

It is an amenable number.

230285921 is a deficient number, since it is larger than the sum of its proper divisors (220579).

230285921 is a wasteful number, since it uses less digits than its factorization.

230285921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220578.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 230285921 is about 15175.1744965256. The cubic root of 230285921 is about 612.9463488710.

The spelling of 230285921 in words is "two hundred thirty million, two hundred eighty-five thousand, nine hundred twenty-one".