242221723 has 2 divisors, whose sum is σ = 242221724. Its totient is φ = 242221722.

The previous prime is 242221711. The next prime is 242221741. The reversal of 242221723 is 327122242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242221723 is a prime.

It is not a weakly prime, because it can be changed into another prime (242221703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121110861 + 121110862.

It is an arithmetic number, because the mean of its divisors is an integer number (121110862).

Almost surely, 2^242221723 is an apocalyptic number.

242221723 is a deficient number, since it is larger than the sum of its proper divisors (1).

242221723 is an equidigital number, since it uses as much as digits as its factorization.

242221723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 25.

The square root of 242221723 is about 15563.4740016489. The cubic root of 242221723 is about 623.3582280721.

Adding to 242221723 its reverse (327122242), we get a palindrome (569343965).

The spelling of 242221723 in words is "two hundred forty-two million, two hundred twenty-one thousand, seven hundred twenty-three".