230407521 has 4 divisors (see below), whose sum is σ = 307210032. Its totient is φ = 153605012.

The previous prime is 230407517. The next prime is 230407543. The reversal of 230407521 is 125704032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 230407521 - 2² = 230407517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 230407491 and 230407500.

It is not an unprimeable number, because it can be changed into a prime (230402521) 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, 38401251 + ... + 38401256.

It is an arithmetic number, because the mean of its divisors is an integer number (76802508).

Almost surely, 2^230407521 is an apocalyptic number.

It is an amenable number.

230407521 is a deficient number, since it is larger than the sum of its proper divisors (76802511).

230407521 is an equidigital number, since it uses as much as digits as its factorization.

230407521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76802510.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 230407521 is about 15179.1805114769. The cubic root of 230407521 is about 613.0542164594.

The spelling of 230407521 in words is "two hundred thirty million, four hundred seven thousand, five hundred twenty-one".