45130181 has 2 divisors, whose sum is σ = 45130182. Its totient is φ = 45130180.

The previous prime is 45130159. The next prime is 45130207. The reversal of 45130181 is 18103154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 17986081 = 5210^2 + 4241^2 .

It is a cyclic number.

It is not a de Polignac number, because 45130181 - 2¹⁴ = 45113797 is a prime.

It is a super-2 number, since 2×45130181² = 4073466474185522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45130081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22565090 + 22565091.

It is an arithmetic number, because the mean of its divisors is an integer number (22565091).

Almost surely, 2^45130181 is an apocalyptic number.

It is an amenable number.

45130181 is a deficient number, since it is larger than the sum of its proper divisors (1).

45130181 is an equidigital number, since it uses as much as digits as its factorization.

45130181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 45130181 is about 6717.9000439125. The cubic root of 45130181 is about 356.0319927693.

It can be divided in two parts, 451 and 30181, that multiplied together give a palindrome (13611631).

The spelling of 45130181 in words is "forty-five million, one hundred thirty thousand, one hundred eighty-one".