231715147 has 2 divisors, whose sum is σ = 231715148. Its totient is φ = 231715146.

The previous prime is 231715079. The next prime is 231715153. The reversal of 231715147 is 741517132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231715147 - 2⁷ = 231715019 is a prime.

It is not a weakly prime, because it can be changed into another prime (231715247) 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 as a sum of consecutive naturals, namely, 115857573 + 115857574.

It is an arithmetic number, because the mean of its divisors is an integer number (115857574).

Almost surely, 2^231715147 is an apocalyptic number.

231715147 is a deficient number, since it is larger than the sum of its proper divisors (1).

231715147 is an equidigital number, since it uses as much as digits as its factorization.

231715147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 231715147 is about 15222.1925818852. The cubic root of 231715147 is about 614.2117797674.

The spelling of 231715147 in words is "two hundred thirty-one million, seven hundred fifteen thousand, one hundred forty-seven".