230451509 has 4 divisors (see below), whose sum is σ = 230865804. Its totient is φ = 230037216.

The previous prime is 230451497. The next prime is 230451511. The reversal of 230451509 is 905154032.

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 51480625 + 178970884 = 7175^2 + 13378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230451509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230451539) 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, 206312 + ... + 207425.

It is an arithmetic number, because the mean of its divisors is an integer number (57716451).

Almost surely, 2^230451509 is an apocalyptic number.

It is an amenable number.

230451509 is a deficient number, since it is larger than the sum of its proper divisors (414295).

230451509 is an equidigital number, since it uses as much as digits as its factorization.

230451509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414294.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 230451509 is about 15180.6294006540. The cubic root of 230451509 is about 613.0932275021.

The spelling of 230451509 in words is "two hundred thirty million, four hundred fifty-one thousand, five hundred nine".