51313844 has 6 divisors (see below), whose sum is σ = 89799234. Its totient is φ = 25656920.

The previous prime is 51313831. The next prime is 51313849. The reversal of 51313844 is 44831315.

It can be written as a sum of positive squares in only one way, i.e., 51294244 + 19600 = 7162^2 + 140^2 .

It is a super-2 number, since 2×51313844² = 5266221172112672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6414227 + ... + 6414234.

It is an arithmetic number, because the mean of its divisors is an integer number (14966539).

Almost surely, 2^51313844 is an apocalyptic number.

It is an amenable number.

51313844 is a deficient number, since it is larger than the sum of its proper divisors (38485390).

51313844 is a wasteful number, since it uses less digits than its factorization.

51313844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828465 (or 12828463 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 51313844 is about 7163.3682021798. The cubic root of 51313844 is about 371.6021201653.

The spelling of 51313844 in words is "fifty-one million, three hundred thirteen thousand, eight hundred forty-four".