242421731 has 2 divisors, whose sum is σ = 242421732. Its totient is φ = 242421730.

The previous prime is 242421719. The next prime is 242421769. The reversal of 242421731 is 137124242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242421731 - 2⁶ = 242421667 is a prime.

It is a super-2 number, since 2×242421731² = 117536591322072722, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 242421731.

It is not a weakly prime, because it can be changed into another prime (242421131) 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, 121210865 + 121210866.

It is an arithmetic number, because the mean of its divisors is an integer number (121210866).

Almost surely, 2^242421731 is an apocalyptic number.

242421731 is a deficient number, since it is larger than the sum of its proper divisors (1).

242421731 is an equidigital number, since it uses as much as digits as its factorization.

242421731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 26.

The square root of 242421731 is about 15569.8982334503. The cubic root of 242421731 is about 623.5297545707.

Adding to 242421731 its reverse (137124242), we get a palindrome (379545973).

The spelling of 242421731 in words is "two hundred forty-two million, four hundred twenty-one thousand, seven hundred thirty-one".