311135148081 has 8 divisors (see below), whose sum is σ = 460940960160. Its totient is φ = 207423432036.

The previous prime is 311135148001. The next prime is 311135148083. The reversal of 311135148081 is 180841531113.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-311135148081 is a prime.

It is a super-2 number, since 2×311135148081² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311135148083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5761761975 + ... + 5761762028.

It is an arithmetic number, because the mean of its divisors is an integer number (57617620020).

Almost surely, 2^311135148081 is an apocalyptic number.

It is an amenable number.

311135148081 is a deficient number, since it is larger than the sum of its proper divisors (149805812079).

311135148081 is a wasteful number, since it uses less digits than its factorization.

311135148081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11523524012 (or 11523524006 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

Adding to 311135148081 its reverse (180841531113), we get a palindrome (491976679194).

The spelling of 311135148081 in words is "three hundred eleven billion, one hundred thirty-five million, one hundred forty-eight thousand, eighty-one".