230532821 has 2 divisors, whose sum is σ = 230532822. Its totient is φ = 230532820.

The previous prime is 230532817. The next prime is 230532851. The reversal of 230532821 is 128235032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136656100 + 93876721 = 11690^2 + 9689^2 .

It is a cyclic number.

It is not a de Polignac number, because 230532821 - 2² = 230532817 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230532851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115266410 + 115266411.

It is an arithmetic number, because the mean of its divisors is an integer number (115266411).

Almost surely, 2^230532821 is an apocalyptic number.

It is an amenable number.

230532821 is a deficient number, since it is larger than the sum of its proper divisors (1).

230532821 is an equidigital number, since it uses as much as digits as its factorization.

230532821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 230532821 is about 15183.3073142843. The cubic root of 230532821 is about 613.1653265085.

Adding to 230532821 its reverse (128235032), we get a palindrome (358767853).

The spelling of 230532821 in words is "two hundred thirty million, five hundred thirty-two thousand, eight hundred twenty-one".