30172271 has 2 divisors, whose sum is σ = 30172272. Its totient is φ = 30172270.

The previous prime is 30172253. The next prime is 30172273. The reversal of 30172271 is 17227103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30172271 - 2²² = 25977967 is a prime.

Together with 30172273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30172273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15086135 + 15086136.

It is an arithmetic number, because the mean of its divisors is an integer number (15086136).

Almost surely, 2^30172271 is an apocalyptic number.

30172271 is a deficient number, since it is larger than the sum of its proper divisors (1).

30172271 is an equidigital number, since it uses as much as digits as its factorization.

30172271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 30172271 is about 5492.9291821395. The cubic root of 30172271 is about 311.3168780447.

Adding to 30172271 its reverse (17227103), we get a palindrome (47399374).

The spelling of 30172271 in words is "thirty million, one hundred seventy-two thousand, two hundred seventy-one".