311143120233013 has 4 divisors (see below), whose sum is σ = 311308709974240. Its totient is φ = 310977530491788.

The previous prime is 311143120232779. The next prime is 311143120233017. The reversal of 311143120233013 is 310332021341113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311143120233013 - 2¹⁷ = 311143120101941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311143120233017) 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, 82794867795 + ... + 82794871552.

It is an arithmetic number, because the mean of its divisors is an integer number (77827177493560).

Almost surely, 2^{311143120233013} is an apocalyptic number.

It is an amenable number.

311143120233013 is a deficient number, since it is larger than the sum of its proper divisors (165589741227).

311143120233013 is a wasteful number, since it uses less digits than its factorization.

311143120233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165589741226.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 311143120233013 its reverse (310332021341113), we get a palindrome (621475141574126).

The spelling of 311143120233013 in words is "three hundred eleven trillion, one hundred forty-three billion, one hundred twenty million, two hundred thirty-three thousand, thirteen".