242545231 has 2 divisors, whose sum is σ = 242545232. Its totient is φ = 242545230.

The previous prime is 242545229. The next prime is 242545243. The reversal of 242545231 is 132545242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242545231 - 2¹ = 242545229 is a prime.

It is a super-2 number, since 2×242545231² = 117656378161686722, which contains 22 as substring.

Together with 242545229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 242545231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242545291) 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, 121272615 + 121272616.

It is an arithmetic number, because the mean of its divisors is an integer number (121272616).

Almost surely, 2^242545231 is an apocalyptic number.

242545231 is a deficient number, since it is larger than the sum of its proper divisors (1).

242545231 is an equidigital number, since it uses as much as digits as its factorization.

242545231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 28.

The square root of 242545231 is about 15573.8637145700. The cubic root of 242545231 is about 623.6356208385.

The spelling of 242545231 in words is "two hundred forty-two million, five hundred forty-five thousand, two hundred thirty-one".