51113844 has 18 divisors (see below), whose sum is σ = 129204530. Its totient is φ = 17037936.

The previous prime is 51113837. The next prime is 51113879. The reversal of 51113844 is 44831115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49702500 + 1411344 = 7050^2 + 1188^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51113844² = 5225250096912672, which contains 22 as substring.

It is a congruent number.

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, 709879 + ... + 709950.

Almost surely, 2^51113844 is an apocalyptic number.

It is an amenable number.

51113844 is an abundant number, since it is smaller than the sum of its proper divisors (78090686).

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

51113844 is a wasteful number, since it uses less digits than its factorization.

51113844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419839 (or 1419834 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 51113844 is about 7149.3946596897. The cubic root of 51113844 is about 371.1187081232.

Adding to 51113844 its reverse (44831115), we get a palindrome (95944959).

The spelling of 51113844 in words is "fifty-one million, one hundred thirteen thousand, eight hundred forty-four".