30147217 has 4 divisors (see below), whose sum is σ = 30158820. Its totient is φ = 30135616.

The previous prime is 30147209. The next prime is 30147223. The reversal of 30147217 is 71274103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11128896 + 19018321 = 3336^2 + 4361^2 .

It is a cyclic number.

It is not a de Polignac number, because 30147217 - 2³ = 30147209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30147191 and 30147200.

It is not an unprimeable number, because it can be changed into a prime (30147277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93 + ... + 7765.

It is an arithmetic number, because the mean of its divisors is an integer number (7539705).

Almost surely, 2^30147217 is an apocalyptic number.

It is an amenable number.

30147217 is a deficient number, since it is larger than the sum of its proper divisors (11603).

30147217 is an equidigital number, since it uses as much as digits as its factorization.

30147217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 30147217 is about 5490.6481402472. The cubic root of 30147217 is about 311.2306852957.

The spelling of 30147217 in words is "thirty million, one hundred forty-seven thousand, two hundred seventeen".