30166261 has 2 divisors, whose sum is σ = 30166262. Its totient is φ = 30166260.

The previous prime is 30166259. The next prime is 30166273. The reversal of 30166261 is 16266103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 463761 = 5450^2 + 681^2 .

It is a cyclic number.

It is not a de Polignac number, because 30166261 - 2¹ = 30166259 is a prime.

Together with 30166259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30166231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15083130 + 15083131.

It is an arithmetic number, because the mean of its divisors is an integer number (15083131).

Almost surely, 2^30166261 is an apocalyptic number.

It is an amenable number.

30166261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30166261 is an equidigital number, since it uses as much as digits as its factorization.

30166261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30166261 is about 5492.3820879469. The cubic root of 30166261 is about 311.2962063195.

The spelling of 30166261 in words is "thirty million, one hundred sixty-six thousand, two hundred sixty-one".