51864115 has 8 divisors (see below), whose sum is σ = 62282880. Its totient is φ = 41460672.

The previous prime is 51864107. The next prime is 51864119. The reversal of 51864115 is 51146815.

51864115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51864115 - 2³ = 51864107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51864119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5847 + ... + 11743.

It is an arithmetic number, because the mean of its divisors is an integer number (7785360).

Almost surely, 2^51864115 is an apocalyptic number.

51864115 is a deficient number, since it is larger than the sum of its proper divisors (10418765).

51864115 is a wasteful number, since it uses less digits than its factorization.

51864115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661.

The product of its digits is 4800, while the sum is 31.

The square root of 51864115 is about 7201.6744580688. The cubic root of 51864115 is about 372.9257088133.

The spelling of 51864115 in words is "fifty-one million, eight hundred sixty-four thousand, one hundred fifteen".