512311340 has 12 divisors (see below), whose sum is σ = 1075853856. Its totient is φ = 204924528.

The previous prime is 512311339. The next prime is 512311343. The reversal of 512311340 is 43113215.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 25615567 = 512311340 / (5 + 1 + 2 + 3 + 1 + 1 + 3 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (512311343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12807764 + ... + 12807803.

It is an arithmetic number, because the mean of its divisors is an integer number (89654488).

Almost surely, 2^512311340 is an apocalyptic number.

It is an amenable number.

512311340 is an abundant number, since it is smaller than the sum of its proper divisors (563542516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512311340 is a wasteful number, since it uses less digits than its factorization.

512311340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25615576 (or 25615574 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 512311340 is about 22634.2956594633. The cubic root of 512311340 is about 800.1621233928.

Adding to 512311340 its reverse (43113215), we get a palindrome (555424555).

The spelling of 512311340 in words is "five hundred twelve million, three hundred eleven thousand, three hundred forty".