51619328 has 40 divisors (see below), whose sum is σ = 105696360. Its totient is φ = 25169920.

The previous prime is 51619241. The next prime is 51619349. The reversal of 51619328 is 82391615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19763 + ... + 22221.

It is an arithmetic number, because the mean of its divisors is an integer number (2642409).

Almost surely, 2^51619328 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 51619328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52848180).

51619328 is an abundant number, since it is smaller than the sum of its proper divisors (54077032).

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

51619328 is an equidigital number, since it uses as much as digits as its factorization.

51619328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2502 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 51619328 is about 7184.6592125166. The cubic root of 51619328 is about 372.3380747501.

The spelling of 51619328 in words is "fifty-one million, six hundred nineteen thousand, three hundred twenty-eight".