51115844 has 48 divisors (see below), whose sum is σ = 101982720. Its totient is φ = 22239360.

The previous prime is 51115829. The next prime is 51115847. The reversal of 51115844 is 44851115.

It is a super-2 number, since 2×51115844² = 5225659015664672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94214 + ... + 94754.

It is an arithmetic number, because the mean of its divisors is an integer number (2124640).

Almost surely, 2^51115844 is an apocalyptic number.

It is an amenable number.

51115844 is a deficient number, since it is larger than the sum of its proper divisors (50866876).

51115844 is a wasteful number, since it uses less digits than its factorization.

51115844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 658 counting only the distinct ones).

The product of its digits is 3200, while the sum is 29.

The square root of 51115844 is about 7149.5345303034. The cubic root of 51115844 is about 371.1235484801.

Adding to 51115844 its reverse (44851115), we get a palindrome (95966959).

The spelling of 51115844 in words is "fifty-one million, one hundred fifteen thousand, eight hundred forty-four".