311220324132431 has 16 divisors (see below), whose sum is σ = 376765847599680. Its totient is φ = 250959761825280.

The previous prime is 311220324132427. The next prime is 311220324132451. The reversal of 311220324132431 is 134231423022113.

It is a cyclic number.

It is not a de Polignac number, because 311220324132431 - 2² = 311220324132427 is a prime.

It is a super-2 number, since 2×311220324132431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220324132451) 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, 566051960 + ... + 566601501.

It is an arithmetic number, because the mean of its divisors is an integer number (23547865474980).

Almost surely, 2^{311220324132431} is an apocalyptic number.

311220324132431 is a deficient number, since it is larger than the sum of its proper divisors (65545523467249).

311220324132431 is a wasteful number, since it uses less digits than its factorization.

311220324132431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132655794.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 311220324132431 its reverse (134231423022113), we get a palindrome (445451747154544).

The spelling of 311220324132431 in words is "three hundred eleven trillion, two hundred twenty billion, three hundred twenty-four million, one hundred thirty-two thousand, four hundred thirty-one".