30215117 has 2 divisors, whose sum is σ = 30215118. Its totient is φ = 30215116.

The previous prime is 30215099. The next prime is 30215161. The reversal of 30215117 is 71151203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23319241 + 6895876 = 4829^2 + 2626^2 .

It is an emirp because it is prime and its reverse (71151203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30215117 - 2¹⁸ = 29952973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30215167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15107558 + 15107559.

It is an arithmetic number, because the mean of its divisors is an integer number (15107559).

Almost surely, 2^30215117 is an apocalyptic number.

It is an amenable number.

30215117 is a deficient number, since it is larger than the sum of its proper divisors (1).

30215117 is an equidigital number, since it uses as much as digits as its factorization.

30215117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 30215117 is about 5496.8279034367. The cubic root of 30215117 is about 311.4641697316.

The spelling of 30215117 in words is "thirty million, two hundred fifteen thousand, one hundred seventeen".