231230815 has 8 divisors (see below), whose sum is σ = 277607808. Its totient is φ = 184897440.

The previous prime is 231230803. The next prime is 231230819. The reversal of 231230815 is 518032132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231230815 - 2⁹ = 231230303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231230815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231230819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2194 + ... + 21616.

It is an arithmetic number, because the mean of its divisors is an integer number (34700976).

Almost surely, 2^231230815 is an apocalyptic number.

231230815 is a deficient number, since it is larger than the sum of its proper divisors (46376993).

231230815 is a wasteful number, since it uses less digits than its factorization.

231230815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21809.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 231230815 is about 15206.2755137476. The cubic root of 231230815 is about 613.7835385541.

Adding to 231230815 its reverse (518032132), we get a palindrome (749262947).

The spelling of 231230815 in words is "two hundred thirty-one million, two hundred thirty thousand, eight hundred fifteen".