51237984 has 96 divisors (see below), whose sum is σ = 161844480. Its totient is φ = 13865472.

The previous prime is 51237973. The next prime is 51238001. The reversal of 51237984 is 48973215.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×51237984³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10762 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (1685880).

Almost surely, 2^51237984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51237984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80922240).

51237984 is an abundant number, since it is smaller than the sum of its proper divisors (110606496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51237984 is a wasteful number, since it uses less digits than its factorization.

51237984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052 (or 4044 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 51237984 is about 7158.0712485976. The cubic root of 51237984 is about 371.4189100896.

The spelling of 51237984 in words is "fifty-one million, two hundred thirty-seven thousand, nine hundred eighty-four".