51504342243 has 32 divisors (see below), whose sum is σ = 71827430400. Its totient is φ = 32795406336.

The previous prime is 51504342203. The next prime is 51504342271. The reversal of 51504342243 is 34224340515.

It is not a de Polignac number, because 51504342243 - 2²⁴ = 51487565027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51504342203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8539753 + ... + 8545781.

It is an arithmetic number, because the mean of its divisors is an integer number (2244607200).

Almost surely, 2^51504342243 is an apocalyptic number.

51504342243 is a deficient number, since it is larger than the sum of its proper divisors (20323088157).

51504342243 is a wasteful number, since it uses less digits than its factorization.

51504342243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7531.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 51504342243 its reverse (34224340515), we get a palindrome (85728682758).

The spelling of 51504342243 in words is "fifty-one billion, five hundred four million, three hundred forty-two thousand, two hundred forty-three".