51779424 has 96 divisors (see below), whose sum is σ = 142442496. Its totient is φ = 16450560.

The previous prime is 51779407. The next prime is 51779447. The reversal of 51779424 is 42497715.

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

It is a super-2 number, since 2×51779424² = 5362217499543552, which contains 22 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, 377884 + ... + 378020.

It is an arithmetic number, because the mean of its divisors is an integer number (1483776).

Almost surely, 2^51779424 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 51779424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71221248).

51779424 is an abundant number, since it is smaller than the sum of its proper divisors (90663072).

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

51779424 is a wasteful number, since it uses less digits than its factorization.

51779424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 300 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 51779424 is about 7195.7921037228. The cubic root of 51779424 is about 372.7226097591.

The spelling of 51779424 in words is "fifty-one million, seven hundred seventy-nine thousand, four hundred twenty-four".