311313043 has 18 divisors (see below), whose sum is σ = 335967324. Its totient is φ = 288420912.

The previous prime is 311313029. The next prime is 311313049. The reversal of 311313043 is 340313113.

It is not a de Polignac number, because 311313043 - 2⁹ = 311312531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 311313043.

It is not an unprimeable number, because it can be changed into a prime (311313049) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1013896 + ... + 1014202.

Almost surely, 2^311313043 is an apocalyptic number.

311313043 is a deficient number, since it is larger than the sum of its proper divisors (24654281).

311313043 is an equidigital number, since it uses as much as digits as its factorization.

311313043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 311313043 is about 17644.0653762108. The cubic root of 311313043 is about 677.7441415290.

Adding to 311313043 its reverse (340313113), we get a palindrome (651626156).

The spelling of 311313043 in words is "three hundred eleven million, three hundred thirteen thousand, forty-three".