51551342313 has 4 divisors (see below), whose sum is σ = 68735123088. Its totient is φ = 34367561540.

The previous prime is 51551342299. The next prime is 51551342329. The reversal of 51551342313 is 31324315515.

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 not a de Polignac number, because 51551342313 - 2⁵ = 51551342281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51551342383) 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, 8591890383 + ... + 8591890388.

It is an arithmetic number, because the mean of its divisors is an integer number (17183780772).

Almost surely, 2^51551342313 is an apocalyptic number.

It is an amenable number.

51551342313 is a deficient number, since it is larger than the sum of its proper divisors (17183780775).

51551342313 is a wasteful number, since it uses less digits than its factorization.

51551342313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183780774.

The product of its digits is 27000, while the sum is 33.

Adding to 51551342313 its reverse (31324315515), we get a palindrome (82875657828).

The spelling of 51551342313 in words is "fifty-one billion, five hundred fifty-one million, three hundred forty-two thousand, three hundred thirteen".