51115838 has 16 divisors (see below), whose sum is σ = 83804544. Its totient is φ = 23278080.

The previous prime is 51115829. The next prime is 51115847. The reversal of 51115838 is 83851115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51115829) and next prime (51115847).

It is a super-2 number, since 2×51115838² = 5225657788884488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23195 + ... + 25302.

It is an arithmetic number, because the mean of its divisors is an integer number (5237784).

Almost surely, 2^51115838 is an apocalyptic number.

51115838 is a deficient number, since it is larger than the sum of its proper divisors (32688706).

51115838 is a wasteful number, since it uses less digits than its factorization.

51115838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48547.

The product of its digits is 4800, while the sum is 32.

The square root of 51115838 is about 7149.5341106956. The cubic root of 51115838 is about 371.1235339592.

The spelling of 51115838 in words is "fifty-one million, one hundred fifteen thousand, eight hundred thirty-eight".