51478037 has 4 divisors (see below), whose sum is σ = 55437900. Its totient is φ = 47518176.

The previous prime is 51478033. The next prime is 51478051. The reversal of 51478037 is 73087415.

51478037 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: 73087415 = 5 ⋅14617483.

It can be written as a sum of positive squares in 2 ways, for example, as 24344356 + 27133681 = 4934^2 + 5209^2 .

It is a cyclic number.

It is not a de Polignac number, because 51478037 - 2² = 51478033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51477988 and 51478006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478033) 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, 1979912 + ... + 1979937.

It is an arithmetic number, because the mean of its divisors is an integer number (13859475).

Almost surely, 2^51478037 is an apocalyptic number.

It is an amenable number.

51478037 is a deficient number, since it is larger than the sum of its proper divisors (3959863).

51478037 is a wasteful number, since it uses less digits than its factorization.

51478037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959862.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 51478037 is about 7174.8196493013. The cubic root of 51478037 is about 371.9980464884.

The spelling of 51478037 in words is "fifty-one million, four hundred seventy-eight thousand, thirty-seven".