311213043 has 8 divisors (see below), whose sum is σ = 461056400. Its totient is φ = 207475344.

The previous prime is 311212997. The next prime is 311213047. The reversal of 311213043 is 340312113.

It is not a de Polignac number, because 311213043 - 2¹³ = 311204851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311213047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5763178 + ... + 5763231.

It is an arithmetic number, because the mean of its divisors is an integer number (57632050).

Almost surely, 2^311213043 is an apocalyptic number.

311213043 is a deficient number, since it is larger than the sum of its proper divisors (149843357).

311213043 is a wasteful number, since it uses less digits than its factorization.

311213043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526418 (or 11526412 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 311213043 is about 17641.2313345753. The cubic root of 311213043 is about 677.6715654155.

Adding to 311213043 its reverse (340312113), we get a palindrome (651525156).

The spelling of 311213043 in words is "three hundred eleven million, two hundred thirteen thousand, forty-three".