51870427 has 16 divisors (see below), whose sum is σ = 60952320. Its totient is φ = 43216992.

The previous prime is 51870421. The next prime is 51870449. The reversal of 51870427 is 72407815.

It is a happy number.

It is not a de Polignac number, because 51870427 - 2¹⁵ = 51837659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51870392 and 51870401.

It is not an unprimeable number, because it can be changed into a prime (51870421) 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, 116868 + ... + 117310.

It is an arithmetic number, because the mean of its divisors is an integer number (3809520).

Almost surely, 2^51870427 is an apocalyptic number.

51870427 is a deficient number, since it is larger than the sum of its proper divisors (9081893).

51870427 is a wasteful number, since it uses less digits than its factorization.

51870427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 51870427 is about 7202.1126761527. The cubic root of 51870427 is about 372.9408368814.

The spelling of 51870427 in words is "fifty-one million, eight hundred seventy thousand, four hundred twenty-seven".