230023521 has 24 divisors (see below), whose sum is σ = 408932160. Its totient is φ = 121330656.

The previous prime is 230023517. The next prime is 230023537. The reversal of 230023521 is 125320032.

It is not a de Polignac number, because 230023521 - 2² = 230023517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 230023494 and 230023503.

It is not an unprimeable number, because it can be changed into a prime (230023501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139611 + ... + 141248.

It is an arithmetic number, because the mean of its divisors is an integer number (17038840).

Almost surely, 2^230023521 is an apocalyptic number.

230023521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

230023521 is a deficient number, since it is larger than the sum of its proper divisors (178908639).

230023521 is a wasteful number, since it uses less digits than its factorization.

230023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280885 (or 280882 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 230023521 is about 15166.5263326841. The cubic root of 230023521 is about 612.7134525238.

Adding to 230023521 its reverse (125320032), we get a palindrome (355343553).

The spelling of 230023521 in words is "two hundred thirty million, twenty-three thousand, five hundred twenty-one".