311230201331 has 16 divisors (see below), whose sum is σ = 365658896064. Its totient is φ = 259307288064.

The previous prime is 311230201313. The next prime is 311230201333. The reversal of 311230201331 is 133102032113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311230201331 is a prime.

It is a super-2 number, since 2×311230201331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (311230201333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314090 + ... + 849183.

It is an arithmetic number, because the mean of its divisors is an integer number (22853681004).

Almost surely, 2^311230201331 is an apocalyptic number.

311230201331 is a deficient number, since it is larger than the sum of its proper divisors (54428694733).

311230201331 is a wasteful number, since it uses less digits than its factorization.

311230201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164350.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311230201331 its reverse (133102032113), we get a palindrome (444332233444).

The spelling of 311230201331 in words is "three hundred eleven billion, two hundred thirty million, two hundred one thousand, three hundred thirty-one".