51233256143 has 4 divisors (see below), whose sum is σ = 51237757368. Its totient is φ = 51228754920.

The previous prime is 51233256083. The next prime is 51233256169. The reversal of 51233256143 is 34165233215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51233256143 - 2¹² = 51233252047 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 (51233253143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2233496 + ... + 2256317.

It is an arithmetic number, because the mean of its divisors is an integer number (12809439342).

Almost surely, 2^51233256143 is an apocalyptic number.

51233256143 is a deficient number, since it is larger than the sum of its proper divisors (4501225).

51233256143 is a wasteful number, since it uses less digits than its factorization.

51233256143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501224.

The product of its digits is 64800, while the sum is 35.

Adding to 51233256143 its reverse (34165233215), we get a palindrome (85398489358).

The spelling of 51233256143 in words is "fifty-one billion, two hundred thirty-three million, two hundred fifty-six thousand, one hundred forty-three".