231489547 has 2 divisors, whose sum is σ = 231489548. Its totient is φ = 231489546.

The previous prime is 231489541. The next prime is 231489553. The reversal of 231489547 is 745984132.

It is a balanced prime because it is at equal distance from previous prime (231489541) and next prime (231489553).

It is a cyclic number.

It is not a de Polignac number, because 231489547 - 2²³ = 223100939 is a prime.

It is not a weakly prime, because it can be changed into another prime (231489541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115744773 + 115744774.

It is an arithmetic number, because the mean of its divisors is an integer number (115744774).

Almost surely, 2^231489547 is an apocalyptic number.

231489547 is a deficient number, since it is larger than the sum of its proper divisors (1).

231489547 is an equidigital number, since it uses as much as digits as its factorization.

231489547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 231489547 is about 15214.7805439316. The cubic root of 231489547 is about 614.0123809604.

The spelling of 231489547 in words is "two hundred thirty-one million, four hundred eighty-nine thousand, five hundred forty-seven".