311340213431 has 8 divisors (see below), whose sum is σ = 344351338464. Its totient is φ = 279623642400.

The previous prime is 311340213403. The next prime is 311340213461. The reversal of 311340213431 is 134312043113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311340213431 is a prime.

It is a super-2 number, since 2×311340213431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311340213431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311340213461) 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, 323637995 + ... + 323638956.

It is an arithmetic number, because the mean of its divisors is an integer number (43043917308).

Almost surely, 2^311340213431 is an apocalyptic number.

311340213431 is a deficient number, since it is larger than the sum of its proper divisors (33011125033).

311340213431 is a wasteful number, since it uses less digits than its factorization.

311340213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647277001.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 311340213431 its reverse (134312043113), we get a palindrome (445652256544).

The spelling of 311340213431 in words is "three hundred eleven billion, three hundred forty million, two hundred thirteen thousand, four hundred thirty-one".