51530035243 has 16 divisors (see below), whose sum is σ = 54202567680. Its totient is φ = 48924158976.

The previous prime is 51530035237. The next prime is 51530035303. The reversal of 51530035243 is 34253003515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51530035243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51530035343) 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, 354271 + ... + 478087.

It is an arithmetic number, because the mean of its divisors is an integer number (3387660480).

Almost surely, 2^51530035243 is an apocalyptic number.

51530035243 is a deficient number, since it is larger than the sum of its proper divisors (2672532437).

51530035243 is a wasteful number, since it uses less digits than its factorization.

51530035243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124086.

The product of its (nonzero) digits is 27000, while the sum is 31.

Adding to 51530035243 its reverse (34253003515), we get a palindrome (85783038758).

The spelling of 51530035243 in words is "fifty-one billion, five hundred thirty million, thirty-five thousand, two hundred forty-three".