51897792 has 56 divisors (see below), whose sum is σ = 138385296. Its totient is φ = 17164288.

The previous prime is 51897773. The next prime is 51897793. The reversal of 51897792 is 29779815.

51897792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51897793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25318 + ... + 27290.

It is an arithmetic number, because the mean of its divisors is an integer number (2471166).

Almost surely, 2^51897792 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 51897792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69192648).

51897792 is an abundant number, since it is smaller than the sum of its proper divisors (86487504).

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

51897792 is a wasteful number, since it uses less digits than its factorization.

51897792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125 (or 2115 counting only the distinct ones).

The product of its digits is 317520, while the sum is 48.

The square root of 51897792 is about 7204.0122154255. The cubic root of 51897792 is about 373.0064088101.

The spelling of 51897792 in words is "fifty-one million, eight hundred ninety-seven thousand, seven hundred ninety-two".