51240711055 has 4 divisors (see below), whose sum is σ = 61488853272. Its totient is φ = 40992568840.

The previous prime is 51240711029. The next prime is 51240711061. The reversal of 51240711055 is 55011704215.

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

It is not a de Polignac number, because 51240711055 - 2²³ = 51232322447 is a prime.

It is a super-2 number, since 2×51240711055² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5124071101 + ... + 5124071110.

It is an arithmetic number, because the mean of its divisors is an integer number (15372213318).

Almost surely, 2^51240711055 is an apocalyptic number.

51240711055 is a deficient number, since it is larger than the sum of its proper divisors (10248142217).

51240711055 is a wasteful number, since it uses less digits than its factorization.

51240711055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10248142216.

The product of its (nonzero) digits is 7000, while the sum is 31.

The spelling of 51240711055 in words is "fifty-one billion, two hundred forty million, seven hundred eleven thousand, fifty-five".