311489343 has 24 divisors (see below), whose sum is σ = 492622416. Its totient is φ = 188092800.

The previous prime is 311489329. The next prime is 311489369. The reversal of 311489343 is 343984113.

It is not a de Polignac number, because 311489343 - 2¹² = 311485247 is a prime.

It is a super-2 number, since 2×311489343² = 194051221605143298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311489298 and 311489307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311489393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22221 + ... + 33417.

It is an arithmetic number, because the mean of its divisors is an integer number (20525934).

Almost surely, 2^311489343 is an apocalyptic number.

311489343 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

311489343 is a deficient number, since it is larger than the sum of its proper divisors (181133073).

311489343 is a wasteful number, since it uses less digits than its factorization.

311489343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495 (or 11492 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 311489343 is about 17649.0606832205. The cubic root of 311489343 is about 677.8720553727.

The spelling of 311489343 in words is "three hundred eleven million, four hundred eighty-nine thousand, three hundred forty-three".