49810181 has 2 divisors, whose sum is σ = 49810182. Its totient is φ = 49810180.

The previous prime is 49810171. The next prime is 49810199. The reversal of 49810181 is 18101894.

49810181 = 4990² + 4991².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24910081 + 24900100 = 4991^2 + 4990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49810181 is a prime.

It is a super-2 number, since 2×49810181² = 4962108262505522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49810171) 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, 24905090 + 24905091.

It is an arithmetic number, because the mean of its divisors is an integer number (24905091).

Almost surely, 2^49810181 is an apocalyptic number.

49810181 is the 4991-st centered square number.

It is an amenable number.

49810181 is a deficient number, since it is larger than the sum of its proper divisors (1).

49810181 is an equidigital number, since it uses as much as digits as its factorization.

49810181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 49810181 is about 7057.6328184456. The cubic root of 49810181 is about 367.9363592098.

The spelling of 49810181 in words is "forty-nine million, eight hundred ten thousand, one hundred eighty-one".