51897982 has 16 divisors (see below), whose sum is σ = 81631872. Its totient is φ = 24698520.

The previous prime is 51897977. The next prime is 51898001. The reversal of 51897982 is 28979815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7033 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (5101992).

Almost surely, 2^51897982 is an apocalyptic number.

51897982 is a deficient number, since it is larger than the sum of its proper divisors (29733890).

51897982 is a wasteful number, since it uses less digits than its factorization.

51897982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583.

The product of its digits is 362880, while the sum is 49.

The square root of 51897982 is about 7204.0254025093. The cubic root of 51897982 is about 373.0068640070.

The spelling of 51897982 in words is "fifty-one million, eight hundred ninety-seven thousand, nine hundred eighty-two".