152181181 has 2 divisors, whose sum is σ = 152181182. Its totient is φ = 152181180.

The previous prime is 152181163. The next prime is 152181191. The reversal of 152181181 is 181181251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110061081 + 42120100 = 10491^2 + 6490^2 .

It is an emirp because it is prime and its reverse (181181251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 152181181 - 2⁵ = 152181149 is a prime.

It is a super-2 number, since 2×152181181² = 46318223701109522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152181151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76090590 + 76090591.

It is an arithmetic number, because the mean of its divisors is an integer number (76090591).

Almost surely, 2^152181181 is an apocalyptic number.

It is an amenable number.

152181181 is a deficient number, since it is larger than the sum of its proper divisors (1).

152181181 is an equidigital number, since it uses as much as digits as its factorization.

152181181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 28.

The square root of 152181181 is about 12336.1736774415. The cubic root of 152181181 is about 533.8922910221.

The spelling of 152181181 in words is "one hundred fifty-two million, one hundred eighty-one thousand, one hundred eighty-one".