51242130243 has 24 divisors (see below), whose sum is σ = 76050086736. Its totient is φ = 33223608000.

The previous prime is 51242130223. The next prime is 51242130271. The reversal of 51242130243 is 34203124215.

51242130243 is a `hidden beast` number, since 51 + 242 + 130 + 243 = 666.

It is not a de Polignac number, because 51242130243 - 2⁸ = 51242129987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51242130223) 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, 757093 + ... + 821993.

It is an arithmetic number, because the mean of its divisors is an integer number (3168753614).

Almost surely, 2^51242130243 is an apocalyptic number.

51242130243 is a deficient number, since it is larger than the sum of its proper divisors (24807956493).

51242130243 is a wasteful number, since it uses less digits than its factorization.

51242130243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67315 (or 67312 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 51242130243 its reverse (34203124215), we get a palindrome (85445254458).

The spelling of 51242130243 in words is "fifty-one billion, two hundred forty-two million, one hundred thirty thousand, two hundred forty-three".