231300215 has 16 divisors (see below), whose sum is σ = 299438208. Its totient is φ = 170866176.

The previous prime is 231300193. The next prime is 231300217. The reversal of 231300215 is 512003132.

231300215 = 2063² + 2064² + ... + 2115².

It is a cyclic number.

It is not a de Polignac number, because 231300215 - 2²⁰ = 230251639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231300193 and 231300202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231300217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21167 + ... + 30176.

It is an arithmetic number, because the mean of its divisors is an integer number (18714888).

Almost surely, 2^231300215 is an apocalyptic number.

231300215 is a deficient number, since it is larger than the sum of its proper divisors (68137993).

231300215 is a wasteful number, since it uses less digits than its factorization.

231300215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51418.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231300215 is about 15208.5572951546. The cubic root of 231300215 is about 613.8449379783.

Adding to 231300215 its reverse (512003132), we get a palindrome (743303347).

The spelling of 231300215 in words is "two hundred thirty-one million, three hundred thousand, two hundred fifteen".