51405344 has 24 divisors (see below), whose sum is σ = 102253788. Its totient is φ = 25436160.

The previous prime is 51405337. The next prime is 51405353. The reversal of 51405344 is 44350415.

It can be written as a sum of positive squares in 2 ways, for example, as 46512400 + 4892944 = 6820^2 + 2212^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5177 + ... + 11384.

Almost surely, 2^51405344 is an apocalyptic number.

It is an amenable number.

51405344 is a deficient number, since it is larger than the sum of its proper divisors (50848444).

51405344 is a wasteful number, since it uses less digits than its factorization.

51405344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668 (or 16660 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 51405344 is about 7169.7520180268. The cubic root of 51405344 is about 371.8228624408.

Adding to 51405344 its reverse (44350415), we get a palindrome (95755759).

The spelling of 51405344 in words is "fifty-one million, four hundred five thousand, three hundred forty-four".