51005244 has 48 divisors (see below), whose sum is σ = 121605120. Its totient is φ = 16635840.

The previous prime is 51005209. The next prime is 51005249. The reversal of 51005244 is 44250015.

It is a self number, because there is not a number n which added to its sum of digits gives 51005244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163849 + ... + 164159.

It is an arithmetic number, because the mean of its divisors is an integer number (2533440).

Almost surely, 2^51005244 is an apocalyptic number.

It is an amenable number.

51005244 is an abundant number, since it is smaller than the sum of its proper divisors (70599876).

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

51005244 is a wasteful number, since it uses less digits than its factorization.

51005244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51005244 is about 7141.7955725434. The cubic root of 51005244 is about 370.8556869522.

Adding to 51005244 its reverse (44250015), we get a palindrome (95255259).

The spelling of 51005244 in words is "fifty-one million, five thousand, two hundred forty-four".