231240481 has 2 divisors, whose sum is σ = 231240482. Its totient is φ = 231240480.

The previous prime is 231240479. The next prime is 231240509. The reversal of 231240481 is 184042132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199261456 + 31979025 = 14116^2 + 5655^2 .

It is a cyclic number.

It is not a de Polignac number, because 231240481 - 2¹ = 231240479 is a prime.

It is a super-2 number, since 2×231240481² = 106944320106222722, which contains 22 as substring.

Together with 231240479, it forms a pair of twin primes.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (231240281) 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, 115620240 + 115620241.

It is an arithmetic number, because the mean of its divisors is an integer number (115620241).

Almost surely, 2^231240481 is an apocalyptic number.

It is an amenable number.

231240481 is a deficient number, since it is larger than the sum of its proper divisors (1).

231240481 is an equidigital number, since it uses as much as digits as its factorization.

231240481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 231240481 is about 15206.5933397326. The cubic root of 231240481 is about 613.7920909739.

The spelling of 231240481 in words is "two hundred thirty-one million, two hundred forty thousand, four hundred eighty-one".