51348637 has 4 divisors (see below), whose sum is σ = 52736476. Its totient is φ = 49960800.

The previous prime is 51348629. The next prime is 51348677. The reversal of 51348637 is 73684315.

51348637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73684315 = 5 ⋅14736863.

It can be written as a sum of positive squares in 2 ways, for example, as 44009956 + 7338681 = 6634^2 + 2709^2 .

It is a cyclic number.

It is not a de Polignac number, because 51348637 - 2³ = 51348629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1387801 = 51348637 / (5 + 1 + 3 + 4 + 8 + 6 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51348596 and 51348605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51348677) 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 3 ways as a sum of consecutive naturals, for example, 693864 + ... + 693937.

It is an arithmetic number, because the mean of its divisors is an integer number (13184119).

Almost surely, 2^51348637 is an apocalyptic number.

It is an amenable number.

51348637 is a deficient number, since it is larger than the sum of its proper divisors (1387839).

51348637 is a wasteful number, since it uses less digits than its factorization.

51348637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387838.

The product of its digits is 60480, while the sum is 37.

The square root of 51348637 is about 7165.7963269967. The cubic root of 51348637 is about 371.6860886131.

The spelling of 51348637 in words is "fifty-one million, three hundred forty-eight thousand, six hundred thirty-seven".