51555053117 has 4 divisors (see below), whose sum is σ = 51786241920. Its totient is φ = 51323864316.

The previous prime is 51555053113. The next prime is 51555053141. The reversal of 51555053117 is 71135055515.

51555053117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71135055515 = 5 ⋅14227011103.

It is a cyclic number.

It is not a de Polignac number, because 51555053117 - 2² = 51555053113 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 (51555053113) 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, 115594067 + ... + 115594512.

It is an arithmetic number, because the mean of its divisors is an integer number (12946560480).

Almost surely, 2^51555053117 is an apocalyptic number.

It is an amenable number.

51555053117 is a deficient number, since it is larger than the sum of its proper divisors (231188803).

51555053117 is a wasteful number, since it uses less digits than its factorization.

51555053117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231188802.

The product of its (nonzero) digits is 65625, while the sum is 38.

The spelling of 51555053117 in words is "fifty-one billion, five hundred fifty-five million, fifty-three thousand, one hundred seventeen".