230217731 has 2 divisors, whose sum is σ = 230217732. Its totient is φ = 230217730.

The previous prime is 230217719. The next prime is 230217751. The reversal of 230217731 is 137712032.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230217731 is a prime.

It is a super-2 number, since 2×230217731² = 106000407333576722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230217731.

It is not a weakly prime, because it can be changed into another prime (230217751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115108865 + 115108866.

It is an arithmetic number, because the mean of its divisors is an integer number (115108866).

Almost surely, 2^230217731 is an apocalyptic number.

230217731 is a deficient number, since it is larger than the sum of its proper divisors (1).

230217731 is an equidigital number, since it uses as much as digits as its factorization.

230217731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 230217731 is about 15172.9275685347. The cubic root of 230217731 is about 612.8858430188.

Adding to 230217731 its reverse (137712032), we get a palindrome (367929763).

The spelling of 230217731 in words is "two hundred thirty million, two hundred seventeen thousand, seven hundred thirty-one".