311312343 has 4 divisors (see below), whose sum is σ = 415083128. Its totient is φ = 207541560.

The previous prime is 311312329. The next prime is 311312363. The reversal of 311312343 is 343213113.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 311312343 - 2¹² = 311308247 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 (311312363) 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, 51885388 + ... + 51885393.

It is an arithmetic number, because the mean of its divisors is an integer number (103770782).

Almost surely, 2^311312343 is an apocalyptic number.

311312343 is a deficient number, since it is larger than the sum of its proper divisors (103770785).

311312343 is a wasteful number, since it uses less digits than its factorization.

311312343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103770784.

The product of its digits is 648, while the sum is 21.

The square root of 311312343 is about 17644.0455395014. The cubic root of 311312343 is about 677.7436335502.

Adding to 311312343 its reverse (343213113), we get a palindrome (654525456).

It can be divided in two parts, 311312 and 343, that added together give a triangular number (311655 = T₇₈₉).

The spelling of 311312343 in words is "three hundred eleven million, three hundred twelve thousand, three hundred forty-three".