51870071 has 16 divisors (see below), whose sum is σ = 57703968. Its totient is φ = 46233600.

The previous prime is 51870059. The next prime is 51870089. The reversal of 51870071 is 17007815.

It is a cyclic number.

It is not a de Polignac number, because 51870071 - 2¹⁰ = 51869047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51870271) 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, 184451 + ... + 184731.

It is an arithmetic number, because the mean of its divisors is an integer number (3606498).

Almost surely, 2^51870071 is an apocalyptic number.

51870071 is a deficient number, since it is larger than the sum of its proper divisors (5833897).

51870071 is a wasteful number, since it uses less digits than its factorization.

51870071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 1960, while the sum is 29.

The square root of 51870071 is about 7202.0879611402. The cubic root of 51870071 is about 372.9399836833.

Adding to 51870071 its reverse (17007815), we get a palindrome (68877886).

The spelling of 51870071 in words is "fifty-one million, eight hundred seventy thousand, seventy-one".