311232020231 has 4 divisors (see below), whose sum is σ = 339525840264. Its totient is φ = 282938200200.

The previous prime is 311232020201. The next prime is 311232020243. The reversal of 311232020231 is 132020232113.

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 311232020231 - 2⁶ = 311232020167 is a prime.

It is a super-2 number, since 2×311232020231² (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 (311232020201) 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, 14146910000 + ... + 14146910021.

It is an arithmetic number, because the mean of its divisors is an integer number (84881460066).

Almost surely, 2^311232020231 is an apocalyptic number.

311232020231 is a deficient number, since it is larger than the sum of its proper divisors (28293820033).

311232020231 is a wasteful number, since it uses less digits than its factorization.

311232020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28293820032.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311232020231 its reverse (132020232113), we get a palindrome (443252252344).

The spelling of 311232020231 in words is "three hundred eleven billion, two hundred thirty-two million, twenty thousand, two hundred thirty-one".