230781181 has 2 divisors, whose sum is σ = 230781182. Its totient is φ = 230781180.

The previous prime is 230781127. The next prime is 230781193. The reversal of 230781181 is 181187032.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189062500 + 41718681 = 13750^2 + 6459^2 .

It is a cyclic number.

It is not a de Polignac number, because 230781181 - 2⁷ = 230781053 is a prime.

It is a super-2 number, since 2×230781181² = 106519907007509522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230781121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115390590 + 115390591.

It is an arithmetic number, because the mean of its divisors is an integer number (115390591).

Almost surely, 2^230781181 is an apocalyptic number.

It is an amenable number.

230781181 is a deficient number, since it is larger than the sum of its proper divisors (1).

230781181 is an equidigital number, since it uses as much as digits as its factorization.

230781181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 230781181 is about 15191.4838314103. The cubic root of 230781181 is about 613.3854413497.

The spelling of 230781181 in words is "two hundred thirty million, seven hundred eighty-one thousand, one hundred eighty-one".