51225384 has 96 divisors (see below), whose sum is σ = 152586720. Its totient is φ = 14281344.

The previous prime is 51225379. The next prime is 51225431. The reversal of 51225384 is 48352215.

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, 50062 + ... + 51074.

It is an arithmetic number, because the mean of its divisors is an integer number (1589445).

Almost surely, 2^51225384 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 51225384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76293360).

51225384 is an abundant number, since it is smaller than the sum of its proper divisors (101361336).

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

51225384 is a wasteful number, since it uses less digits than its factorization.

51225384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1068 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 51225384 is about 7157.1910691276. The cubic root of 51225384 is about 371.3884622229.

Adding to 51225384 its reverse (48352215), we get a palindrome (99577599).

The spelling of 51225384 in words is "fifty-one million, two hundred twenty-five thousand, three hundred eighty-four".