51455984 has 20 divisors (see below), whose sum is σ = 102128880. Its totient is φ = 25100160.

The previous prime is 51455981. The next prime is 51456007. The reversal of 51455984 is 48955415.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455981) 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, 38564 + ... + 39875.

It is an arithmetic number, because the mean of its divisors is an integer number (5106444).

Almost surely, 2^51455984 is an apocalyptic number.

It is an amenable number.

51455984 is a deficient number, since it is larger than the sum of its proper divisors (50672896).

51455984 is a wasteful number, since it uses less digits than its factorization.

51455984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78488 (or 78482 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 51455984 is about 7173.2826516177. The cubic root of 51455984 is about 371.9449180401.

The spelling of 51455984 in words is "fifty-one million, four hundred fifty-five thousand, nine hundred eighty-four".