231215107 has 2 divisors, whose sum is σ = 231215108. Its totient is φ = 231215106.

The previous prime is 231215099. The next prime is 231215129. The reversal of 231215107 is 701512132.

It is a happy number.

It is an a-pointer prime, because the next prime (231215129) can be obtained adding 231215107 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231215107 - 2³ = 231215099 is a prime.

It is not a weakly prime, because it can be changed into another prime (231215407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115607553 + 115607554.

It is an arithmetic number, because the mean of its divisors is an integer number (115607554).

Almost surely, 2^231215107 is an apocalyptic number.

231215107 is a deficient number, since it is larger than the sum of its proper divisors (1).

231215107 is an equidigital number, since it uses as much as digits as its factorization.

231215107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 231215107 is about 15205.7590076918. The cubic root of 231215107 is about 613.7696396999.

Adding to 231215107 its reverse (701512132), we get a palindrome (932727239).

The spelling of 231215107 in words is "two hundred thirty-one million, two hundred fifteen thousand, one hundred seven".