51997792 has 96 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 19783680.

The previous prime is 51997789. The next prime is 51997801. The reversal of 51997792 is 29779915.

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, 115584 + ... + 116032.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^51997792 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 51997792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65318400).

51997792 is an abundant number, since it is smaller than the sum of its proper divisors (78639008).

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

51997792 is a wasteful number, since it uses less digits than its factorization.

51997792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 516 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 51997792 is about 7210.9494520486. The cubic root of 51997792 is about 373.2458326681.

The spelling of 51997792 in words is "fifty-one million, nine hundred ninety-seven thousand, seven hundred ninety-two".