230186721 has 4 divisors (see below), whose sum is σ = 306915632. Its totient is φ = 153457812.

The previous prime is 230186713. The next prime is 230186753. The reversal of 230186721 is 127681032.

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 not a de Polignac number, because 230186721 - 2³ = 230186713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230186771) 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, 38364451 + ... + 38364456.

It is an arithmetic number, because the mean of its divisors is an integer number (76728908).

Almost surely, 2^230186721 is an apocalyptic number.

It is an amenable number.

230186721 is a deficient number, since it is larger than the sum of its proper divisors (76728911).

230186721 is an equidigital number, since it uses as much as digits as its factorization.

230186721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76728910.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 230186721 is about 15171.9056482698. The cubic root of 230186721 is about 612.8583235002.

The spelling of 230186721 in words is "two hundred thirty million, one hundred eighty-six thousand, seven hundred twenty-one".