51998937 has 16 divisors (see below), whose sum is σ = 73560960. Its totient is φ = 32559872.

The previous prime is 51998809. The next prime is 51998939. The reversal of 51998937 is 73989915.

It is a happy number.

51998937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51998937 - 2⁷ = 51998809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 51998937.

It is not an unprimeable number, because it can be changed into a prime (51998939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38764 + ... + 40082.

It is an arithmetic number, because the mean of its divisors is an integer number (4597560).

Almost surely, 2^51998937 is an apocalyptic number.

It is an amenable number.

51998937 is a deficient number, since it is larger than the sum of its proper divisors (21562023).

51998937 is a wasteful number, since it uses less digits than its factorization.

51998937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its digits is 612360, while the sum is 51.

The square root of 51998937 is about 7211.0288447627. The cubic root of 51998937 is about 373.2485722930.

The spelling of 51998937 in words is "fifty-one million, nine hundred ninety-eight thousand, nine hundred thirty-seven".