51996224 has 56 divisors (see below), whose sum is σ = 118628160. Its totient is φ = 22150656.

The previous prime is 51996223. The next prime is 51996229. The reversal of 51996224 is 42269915.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51996223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123887 + ... + 124305.

It is an arithmetic number, because the mean of its divisors is an integer number (2118360).

Almost surely, 2^51996224 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 51996224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59314080).

51996224 is an abundant number, since it is smaller than the sum of its proper divisors (66631936).

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

51996224 is a wasteful number, since it uses less digits than its factorization.

51996224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 705 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 51996224 is about 7210.8407276822. The cubic root of 51996224 is about 373.2420808719.

The spelling of 51996224 in words is "fifty-one million, nine hundred ninety-six thousand, two hundred twenty-four".