51338847 has 16 divisors (see below), whose sum is σ = 80140032. Its totient is φ = 28620480.

The previous prime is 51338839. The next prime is 51338857. The reversal of 51338847 is 74883315.

It is not a de Polignac number, because 51338847 - 2³ = 51338839 is a prime.

It is a super-2 number, since 2×51338847² = 5271354422578818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51338857) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28953 + ... + 30674.

It is an arithmetic number, because the mean of its divisors is an integer number (5008752).

Almost surely, 2^51338847 is an apocalyptic number.

51338847 is a deficient number, since it is larger than the sum of its proper divisors (28801185).

51338847 is a wasteful number, since it uses less digits than its factorization.

51338847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59678.

The product of its digits is 80640, while the sum is 39.

The square root of 51338847 is about 7165.1131882197. The cubic root of 51338847 is about 371.6624655382.

The spelling of 51338847 in words is "fifty-one million, three hundred thirty-eight thousand, eight hundred forty-seven".