63181121 has 2 divisors, whose sum is σ = 63181122. Its totient is φ = 63181120.

The previous prime is 63181109. The next prime is 63181187. The reversal of 63181121 is 12118136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 7230721 = 7480^2 + 2689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63181121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63181021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31590560 + 31590561.

It is an arithmetic number, because the mean of its divisors is an integer number (31590561).

Almost surely, 2^63181121 is an apocalyptic number.

It is an amenable number.

63181121 is a deficient number, since it is larger than the sum of its proper divisors (1).

63181121 is an equidigital number, since it uses as much as digits as its factorization.

63181121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 63181121 is about 7948.6552950798. The cubic root of 63181121 is about 398.2866738451.

Adding to 63181121 its reverse (12118136), we get a palindrome (75299257).

The spelling of 63181121 in words is "sixty-three million, one hundred eighty-one thousand, one hundred twenty-one".