30717145 has 8 divisors (see below), whose sum is σ = 37082304. Its totient is φ = 24425904.

The previous prime is 30717139. The next prime is 30717149. The reversal of 30717145 is 54171703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30717145 - 2¹⁵ = 30684377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30717149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17559 + ... + 19228.

It is an arithmetic number, because the mean of its divisors is an integer number (4635288).

Almost surely, 2^30717145 is an apocalyptic number.

It is an amenable number.

30717145 is a deficient number, since it is larger than the sum of its proper divisors (6365159).

30717145 is a wasteful number, since it uses less digits than its factorization.

30717145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36959.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 30717145 is about 5542.3050258895. The cubic root of 30717145 is about 313.1797087819.

Adding to 30717145 its reverse (54171703), we get a palindrome (84888848).

The spelling of 30717145 in words is "thirty million, seven hundred seventeen thousand, one hundred forty-five".