51442262873 has 4 divisors (see below), whose sum is σ = 52832594340. Its totient is φ = 50051931408.

The previous prime is 51442262863. The next prime is 51442262881. The reversal of 51442262873 is 37826224415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36310064704 + 15132198169 = 190552^2 + 123013^2 .

It is a cyclic number.

It is not a de Polignac number, because 51442262873 - 2²⁸ = 51173827417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51442262863) 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, 695165678 + ... + 695165751.

It is an arithmetic number, because the mean of its divisors is an integer number (13208148585).

Almost surely, 2^51442262873 is an apocalyptic number.

It is an amenable number.

51442262873 is a deficient number, since it is larger than the sum of its proper divisors (1390331467).

51442262873 is a wasteful number, since it uses less digits than its factorization.

51442262873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390331466.

The product of its digits is 645120, while the sum is 44.

The spelling of 51442262873 in words is "fifty-one billion, four hundred forty-two million, two hundred sixty-two thousand, eight hundred seventy-three".