51115584 has 56 divisors (see below), whose sum is σ = 145653760. Its totient is φ = 15727104.

The previous prime is 51115577. The next prime is 51115601. The reversal of 51115584 is 48551115.

It is a super-2 number, since 2×51115584² = 5225605855322112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7744 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (2600960).

Almost surely, 2^51115584 is an apocalyptic number.

It is an amenable number.

51115584 is an abundant number, since it is smaller than the sum of its proper divisors (94538176).

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

51115584 is a wasteful number, since it uses less digits than its factorization.

51115584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20507 (or 20497 counting only the distinct ones).

The product of its digits is 4000, while the sum is 30.

The square root of 51115584 is about 7149.5163472783. The cubic root of 51115584 is about 371.1229192408.

Adding to 51115584 its reverse (48551115), we get a palindrome (99666699).

The spelling of 51115584 in words is "fifty-one million, one hundred fifteen thousand, five hundred eighty-four".