30243181 has 2 divisors, whose sum is σ = 30243182. Its totient is φ = 30243180.

The previous prime is 30243163. The next prime is 30243209. The reversal of 30243181 is 18134203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29877156 + 366025 = 5466^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 30243181 - 2⁹ = 30242669 is a prime.

It is a super-2 number, since 2×30243181² = 1829299993997522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30243121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15121590 + 15121591.

It is an arithmetic number, because the mean of its divisors is an integer number (15121591).

Almost surely, 2^30243181 is an apocalyptic number.

It is an amenable number.

30243181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30243181 is an equidigital number, since it uses as much as digits as its factorization.

30243181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 30243181 is about 5499.3800559699. The cubic root of 30243181 is about 311.5605698840.

Adding to 30243181 its reverse (18134203), we get a palindrome (48377384).

The spelling of 30243181 in words is "thirty million, two hundred forty-three thousand, one hundred eighty-one".