311323030231 has 4 divisors (see below), whose sum is σ = 311325643000. Its totient is φ = 311320417464.

The previous prime is 311323030189. The next prime is 311323030243. The reversal of 311323030231 is 132030323113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311323030231 - 2¹¹ = 311323028183 is a prime.

It is a super-2 number, since 2×311323030231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311323037231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118661 + ... + 1368958.

It is an arithmetic number, because the mean of its divisors is an integer number (77831410750).

Almost surely, 2^311323030231 is an apocalyptic number.

311323030231 is a deficient number, since it is larger than the sum of its proper divisors (2612769).

311323030231 is a wasteful number, since it uses less digits than its factorization.

311323030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612768.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 311323030231 its reverse (132030323113), we get a palindrome (443353353344).

The spelling of 311323030231 in words is "three hundred eleven billion, three hundred twenty-three million, thirty thousand, two hundred thirty-one".