51695424 has 168 divisors, whose sum is σ = 166420800. Its totient is φ = 15206400.

The previous prime is 51695411. The next prime is 51695431. The reversal of 51695424 is 42459615.

51695424 is a `hidden beast` number, since 51 + 69 + 542 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 259677 + ... + 259875.

It is an arithmetic number, because the mean of its divisors is an integer number (990600).

Almost surely, 2^51695424 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 51695424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83210400).

51695424 is an abundant number, since it is smaller than the sum of its proper divisors (114725376).

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

51695424 is a wasteful number, since it uses less digits than its factorization.

51695424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 256 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51695424 is about 7189.9529901106. The cubic root of 51695424 is about 372.5209489292.

The spelling of 51695424 in words is "fifty-one million, six hundred ninety-five thousand, four hundred twenty-four".