51732761 has 4 divisors (see below), whose sum is σ = 51749412. Its totient is φ = 51716112.

The previous prime is 51732749. The next prime is 51732767. The reversal of 51732761 is 16723715.

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 44142736 + 7590025 = 6644^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 51732761 - 2¹⁴ = 51716377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51732767) 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, 2126 + ... + 10391.

It is an arithmetic number, because the mean of its divisors is an integer number (12937353).

Almost surely, 2^51732761 is an apocalyptic number.

It is an amenable number.

51732761 is a deficient number, since it is larger than the sum of its proper divisors (16651).

51732761 is a wasteful number, since it uses less digits than its factorization.

51732761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650.

The product of its digits is 8820, while the sum is 32.

The square root of 51732761 is about 7192.5489918387. The cubic root of 51732761 is about 372.6106117168.

The spelling of 51732761 in words is "fifty-one million, seven hundred thirty-two thousand, seven hundred sixty-one".