51719984 has 20 divisors (see below), whose sum is σ = 106102584. Its totient is φ = 24338688.

The previous prime is 51719981. The next prime is 51720029. The reversal of 51719984 is 48991715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51719981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94802 + ... + 95345.

Almost surely, 2^51719984 is an apocalyptic number.

It is an amenable number.

51719984 is an abundant number, since it is smaller than the sum of its proper divisors (54382600).

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

51719984 is a wasteful number, since it uses less digits than its factorization.

51719984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190172 (or 190166 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 51719984 is about 7191.6607261466. The cubic root of 51719984 is about 372.5799332989.

The spelling of 51719984 in words is "fifty-one million, seven hundred nineteen thousand, nine hundred eighty-four".