30506071 has 2 divisors, whose sum is σ = 30506072. Its totient is φ = 30506070.

The previous prime is 30506059. The next prime is 30506107. The reversal of 30506071 is 17060503.

Together with next prime (30506107) 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 a de Polignac number, because none of the positive numbers 2^k-30506071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30506011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15253035 + 15253036.

It is an arithmetic number, because the mean of its divisors is an integer number (15253036).

Almost surely, 2^30506071 is an apocalyptic number.

30506071 is a deficient number, since it is larger than the sum of its proper divisors (1).

30506071 is an equidigital number, since it uses as much as digits as its factorization.

30506071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 30506071 is about 5523.2301237591. The cubic root of 30506071 is about 312.4607174089.

Adding to 30506071 its reverse (17060503), we get a palindrome (47566574).

The spelling of 30506071 in words is "thirty million, five hundred six thousand, seventy-one".