30242731 has 2 divisors, whose sum is σ = 30242732. Its totient is φ = 30242730.

The previous prime is 30242713. The next prime is 30242741. The reversal of 30242731 is 13724203.

Together with previous prime (30242713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30242731 - 2⁷ = 30242603 is a prime.

It is a super-2 number, since 2×30242731² = 1829245556676722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30242741) 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, 15121365 + 15121366.

It is an arithmetic number, because the mean of its divisors is an integer number (15121366).

Almost surely, 2^30242731 is an apocalyptic number.

30242731 is a deficient number, since it is larger than the sum of its proper divisors (1).

30242731 is an equidigital number, since it uses as much as digits as its factorization.

30242731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 30242731 is about 5499.3391421152. The cubic root of 30242731 is about 311.5590245995.

Adding to 30242731 its reverse (13724203), we get a palindrome (43966934).

The spelling of 30242731 in words is "thirty million, two hundred forty-two thousand, seven hundred thirty-one".