30166181 has 2 divisors, whose sum is σ = 30166182. Its totient is φ = 30166180.

The previous prime is 30166163. The next prime is 30166187. The reversal of 30166181 is 18166103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17986081 + 12180100 = 4241^2 + 3490^2 .

It is an emirp because it is prime and its reverse (18166103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30166181 - 2²² = 25971877 is a prime.

It is a super-2 number, since 2×30166181² = 1819996952249522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30166181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30166187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15083090 + 15083091.

It is an arithmetic number, because the mean of its divisors is an integer number (15083091).

Almost surely, 2^30166181 is an apocalyptic number.

It is an amenable number.

30166181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30166181 is an equidigital number, since it uses as much as digits as its factorization.

30166181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 30166181 is about 5492.3748051276. The cubic root of 30166181 is about 311.2959311366.

The spelling of 30166181 in words is "thirty million, one hundred sixty-six thousand, one hundred eighty-one".