51040872 has 48 divisors (see below), whose sum is σ = 141186240. Its totient is φ = 16650528.

The previous prime is 51040861. The next prime is 51040879. The reversal of 51040872 is 27804015.

It is a super-2 number, since 2×51040872² = 5210341229040768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51040879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4158 + ... + 10925.

It is an arithmetic number, because the mean of its divisors is an integer number (2941380).

Almost surely, 2^51040872 is an apocalyptic number.

It is an amenable number.

51040872 is an abundant number, since it is smaller than the sum of its proper divisors (90145368).

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

51040872 is a wasteful number, since it uses less digits than its factorization.

51040872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15142 (or 15135 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51040872 is about 7144.2894678197. The cubic root of 51040872 is about 370.9420164490.

Adding to 51040872 its reverse (27804015), we get a palindrome (78844887).

The spelling of 51040872 in words is "fifty-one million, forty thousand, eight hundred seventy-two".