51127793 has 4 divisors (see below), whose sum is σ = 51163620. Its totient is φ = 51091968.

The previous prime is 51127759. The next prime is 51127799. The reversal of 51127793 is 39772115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39772115 = 5 ⋅7954423.

It can be written as a sum of positive squares in 2 ways, for example, as 16459249 + 34668544 = 4057^2 + 5888^2 .

It is a cyclic number.

It is not a de Polignac number, because 51127793 - 2²⁴ = 34350577 is a prime.

It is a super-2 number, since 2×51127793² = 5228102434101698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51127799) 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, 15680 + ... + 18657.

It is an arithmetic number, because the mean of its divisors is an integer number (12790905).

Almost surely, 2^51127793 is an apocalyptic number.

It is an amenable number.

51127793 is a deficient number, since it is larger than the sum of its proper divisors (35827).

51127793 is a wasteful number, since it uses less digits than its factorization.

51127793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35826.

The product of its digits is 13230, while the sum is 35.

The square root of 51127793 is about 7150.3701302800. The cubic root of 51127793 is about 371.1524645619.

The spelling of 51127793 in words is "fifty-one million, one hundred twenty-seven thousand, seven hundred ninety-three".