231067481 has 2 divisors, whose sum is σ = 231067482. Its totient is φ = 231067480.

The previous prime is 231067477. The next prime is 231067489. The reversal of 231067481 is 184760132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211848025 + 19219456 = 14555^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 231067481 - 2² = 231067477 is a prime.

It is a super-2 number, since 2×231067481² = 106784361551370722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231067489) 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, 115533740 + 115533741.

It is an arithmetic number, because the mean of its divisors is an integer number (115533741).

Almost surely, 2^231067481 is an apocalyptic number.

It is an amenable number.

231067481 is a deficient number, since it is larger than the sum of its proper divisors (1).

231067481 is an equidigital number, since it uses as much as digits as its factorization.

231067481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 231067481 is about 15200.9039533838. The cubic root of 231067481 is about 613.6389855388.

The spelling of 231067481 in words is "two hundred thirty-one million, sixty-seven thousand, four hundred eighty-one".