51040181 has 2 divisors, whose sum is σ = 51040182. Its totient is φ = 51040180.

The previous prime is 51040169. The next prime is 51040193. The reversal of 51040181 is 18104015.

It is a balanced prime because it is at equal distance from previous prime (51040169) and next prime (51040193).

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 7612081 = 6590^2 + 2759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51040181 is a prime.

It is a super-2 number, since 2×51040181² = 5210200153025522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51040141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25520090 + 25520091.

It is an arithmetic number, because the mean of its divisors is an integer number (25520091).

Almost surely, 2^51040181 is an apocalyptic number.

It is an amenable number.

51040181 is a deficient number, since it is larger than the sum of its proper divisors (1).

51040181 is an equidigital number, since it uses as much as digits as its factorization.

51040181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 51040181 is about 7144.2411073535. The cubic root of 51040181 is about 370.9403424828.

Adding to 51040181 its reverse (18104015), we get a palindrome (69144196).

The spelling of 51040181 in words is "fifty-one million, forty thousand, one hundred eighty-one".