30172771 has 2 divisors, whose sum is σ = 30172772. Its totient is φ = 30172770.

The previous prime is 30172763. The next prime is 30172781. The reversal of 30172771 is 17727103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30172771 - 2³ = 30172763 is a prime.

It is a super-2 number, since 2×30172771² = 1820792219636882, which contains 22 as substring.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (30172721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15086385 + 15086386.

It is an arithmetic number, because the mean of its divisors is an integer number (15086386).

Almost surely, 2^30172771 is an apocalyptic number.

30172771 is a deficient number, since it is larger than the sum of its proper divisors (1).

30172771 is an equidigital number, since it uses as much as digits as its factorization.

30172771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 30172771 is about 5492.9746950082. The cubic root of 30172771 is about 311.3185976984.

Adding to 30172771 its reverse (17727103), we get a palindrome (47899874).

The spelling of 30172771 in words is "thirty million, one hundred seventy-two thousand, seven hundred seventy-one".