242743931 has 2 divisors, whose sum is σ = 242743932. Its totient is φ = 242743930.

The previous prime is 242743913. The next prime is 242743961. The reversal of 242743931 is 139347242.

Together with previous prime (242743913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242743931 - 2¹⁸ = 242481787 is a prime.

It is a super-2 number, since 2×242743931² = 117849232074665522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242743891 and 242743900.

It is not a weakly prime, because it can be changed into another prime (242743961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121371965 + 121371966.

It is an arithmetic number, because the mean of its divisors is an integer number (121371966).

Almost surely, 2^242743931 is an apocalyptic number.

242743931 is a deficient number, since it is larger than the sum of its proper divisors (1).

242743931 is an equidigital number, since it uses as much as digits as its factorization.

242743931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 242743931 is about 15580.2416861870. The cubic root of 242743931 is about 623.8058744089.

The spelling of 242743931 in words is "two hundred forty-two million, seven hundred forty-three thousand, nine hundred thirty-one".