51127513 has 4 divisors (see below), whose sum is σ = 51633828. Its totient is φ = 50621200.

The previous prime is 51127511. The next prime is 51127529. The reversal of 51127513 is 31572115.

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 22963264 + 28164249 = 4792^2 + 5307^2 .

It is not a de Polignac number, because 51127513 - 2¹ = 51127511 is a prime.

It is a super-2 number, since 2×51127513² = 5228045171130338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51127511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253006 + ... + 253207.

It is an arithmetic number, because the mean of its divisors is an integer number (12908457).

Almost surely, 2^51127513 is an apocalyptic number.

It is an amenable number.

51127513 is a deficient number, since it is larger than the sum of its proper divisors (506315).

51127513 is a wasteful number, since it uses less digits than its factorization.

51127513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506314.

The product of its digits is 1050, while the sum is 25.

The square root of 51127513 is about 7150.3505508471. The cubic root of 51127513 is about 371.1517870251.

Adding to 51127513 its reverse (31572115), we get a palindrome (82699628).

The spelling of 51127513 in words is "fifty-one million, one hundred twenty-seven thousand, five hundred thirteen".