51555053119 has 4 divisors (see below), whose sum is σ = 51558174144. Its totient is φ = 51551932096.

The previous prime is 51555053113. The next prime is 51555053141. The reversal of 51555053119 is 91135055515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51555053119 is a prime.

It is a super-2 number, since 2×51555053119² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555053113) 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 3 ways as a sum of consecutive naturals, for example, 1535602 + ... + 1568815.

It is an arithmetic number, because the mean of its divisors is an integer number (12889543536).

Almost surely, 2^51555053119 is an apocalyptic number.

51555053119 is a deficient number, since it is larger than the sum of its proper divisors (3121025).

51555053119 is a wasteful number, since it uses less digits than its factorization.

51555053119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121024.

The product of its (nonzero) digits is 84375, while the sum is 40.

The spelling of 51555053119 in words is "fifty-one billion, five hundred fifty-five million, fifty-three thousand, one hundred nineteen".