51021344 has 36 divisors (see below), whose sum is σ = 110418462. Its totient is φ = 23189760.

The previous prime is 51021331. The next prime is 51021391. The reversal of 51021344 is 44312015.

It can be written as a sum of positive squares in only one way, i.e., 40704400 + 10316944 = 6380^2 + 3212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2717 + ... + 10460.

Almost surely, 2^51021344 is an apocalyptic number.

It is an amenable number.

51021344 is an abundant number, since it is smaller than the sum of its proper divisors (59397118).

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

51021344 is a wasteful number, since it uses less digits than its factorization.

51021344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13209 (or 13190 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51021344 is about 7142.9226511282. The cubic root of 51021344 is about 370.8947035184.

Adding to 51021344 its reverse (44312015), we get a palindrome (95333359).

It can be divided in two parts, 5102 and 1344, that added together give a palindrome (6446).

The spelling of 51021344 in words is "fifty-one million, twenty-one thousand, three hundred forty-four".