51243210343 has 16 divisors (see below), whose sum is σ = 56037199680. Its totient is φ = 46575922176.

The previous prime is 51243210331. The next prime is 51243210371. The reversal of 51243210343 is 34301234215.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51243210343 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 (51243210373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145278 + ... + 351556.

It is an arithmetic number, because the mean of its divisors is an integer number (3502324980).

Almost surely, 2^51243210343 is an apocalyptic number.

51243210343 is a deficient number, since it is larger than the sum of its proper divisors (4793989337).

51243210343 is a wasteful number, since it uses less digits than its factorization.

51243210343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206586.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 51243210343 its reverse (34301234215), we get a palindrome (85544444558).

The spelling of 51243210343 in words is "fifty-one billion, two hundred forty-three million, two hundred ten thousand, three hundred forty-three".