51243142233 has 16 divisors (see below), whose sum is σ = 68412237120. Its totient is φ = 34118105856.

The previous prime is 51243142219. The next prime is 51243142271. The reversal of 51243142233 is 33224134215.

It is not a de Polignac number, because 51243142233 - 2²⁹ = 50706271321 is a prime.

It is a super-2 number, since 2×51243142233² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51243142233.

It is not an unprimeable number, because it can be changed into a prime (51243142283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10376941 + ... + 10381877.

It is an arithmetic number, because the mean of its divisors is an integer number (4275764820).

Almost surely, 2^51243142233 is an apocalyptic number.

It is an amenable number.

51243142233 is a deficient number, since it is larger than the sum of its proper divisors (17169094887).

51243142233 is a wasteful number, since it uses less digits than its factorization.

51243142233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8696.

The product of its digits is 17280, while the sum is 30.

Adding to 51243142233 its reverse (33224134215), we get a palindrome (84467276448).

The spelling of 51243142233 in words is "fifty-one billion, two hundred forty-three million, one hundred forty-two thousand, two hundred thirty-three".