51142320233 has 4 divisors (see below), whose sum is σ = 52009139280. Its totient is φ = 50275501188.

The previous prime is 51142320223. The next prime is 51142320241. The reversal of 51142320233 is 33202324115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51142320233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142320223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433409435 + ... + 433409552.

It is an arithmetic number, because the mean of its divisors is an integer number (13002284820).

Almost surely, 2^51142320233 is an apocalyptic number.

It is an amenable number.

51142320233 is a deficient number, since it is larger than the sum of its proper divisors (866819047).

51142320233 is an equidigital number, since it uses as much as digits as its factorization.

51142320233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866819046.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 51142320233 its reverse (33202324115), we get a palindrome (84344644348).

The spelling of 51142320233 in words is "fifty-one billion, one hundred forty-two million, three hundred twenty thousand, two hundred thirty-three".