31634135081 has 2 divisors, whose sum is σ = 31634135082. Its totient is φ = 31634135080.

The previous prime is 31634135053. The next prime is 31634135147. The reversal of 31634135081 is 18053143613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25821597481 + 5812537600 = 160691^2 + 76240^2 .

It is a cyclic number.

It is not a de Polignac number, because 31634135081 - 2⁶ = 31634135017 is a prime.

It is a super-2 number, since 2×31634135081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31630135081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15817067540 + 15817067541.

It is an arithmetic number, because the mean of its divisors is an integer number (15817067541).

Almost surely, 2^31634135081 is an apocalyptic number.

It is an amenable number.

31634135081 is a deficient number, since it is larger than the sum of its proper divisors (1).

31634135081 is an equidigital number, since it uses as much as digits as its factorization.

31634135081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 31634135081 its reverse (18053143613), we get a palindrome (49687278694).

The spelling of 31634135081 in words is "thirty-one billion, six hundred thirty-four million, one hundred thirty-five thousand, eighty-one".