51987733 has 8 divisors (see below), whose sum is σ = 59535360. Its totient is φ = 44470320.

The previous prime is 51987707. The next prime is 51987757. The reversal of 51987733 is 33778915.

51987733 = 1092² + 1093² + ... + 1133².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51987733 - 2¹⁷ = 51856661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51987733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51987773) 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 7 ways as a sum of consecutive naturals, for example, 3733 + ... + 10858.

It is an arithmetic number, because the mean of its divisors is an integer number (7441920).

Almost surely, 2^51987733 is an apocalyptic number.

It is an amenable number.

51987733 is a deficient number, since it is larger than the sum of its proper divisors (7547627).

51987733 is a wasteful number, since it uses less digits than its factorization.

51987733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15107.

The product of its digits is 158760, while the sum is 43.

The square root of 51987733 is about 7210.2519373459. The cubic root of 51987733 is about 373.2217629155.

The spelling of 51987733 in words is "fifty-one million, nine hundred eighty-seven thousand, seven hundred thirty-three".