311431426133 has 4 divisors (see below), whose sum is σ = 311433030348. Its totient is φ = 311429821920.

The previous prime is 311431426121. The next prime is 311431426151. The reversal of 311431426133 is 331624134113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331624134113 = 280583 ⋅1181911.

It can be written as a sum of positive squares in 2 ways, for example, as 3115537489 + 308315888644 = 55817^2 + 555262^2 .

It is a cyclic number.

It is not a de Polignac number, because 311431426133 - 2¹⁴ = 311431409749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 311431426133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311431426183) 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, 463166 + ... + 915087.

It is an arithmetic number, because the mean of its divisors is an integer number (77858257587).

Almost surely, 2^311431426133 is an apocalyptic number.

It is an amenable number.

311431426133 is a deficient number, since it is larger than the sum of its proper divisors (1604215).

311431426133 is a wasteful number, since it uses less digits than its factorization.

311431426133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604214.

The product of its digits is 15552, while the sum is 32.

The spelling of 311431426133 in words is "three hundred eleven billion, four hundred thirty-one million, four hundred twenty-six thousand, one hundred thirty-three".