51870005 has 8 divisors (see below), whose sum is σ = 67902624. Its totient is φ = 37723600.

The previous prime is 51869977. The next prime is 51870059. The reversal of 51870005 is 50007815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51870005 - 2¹⁰ = 51868981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471491 + ... + 471600.

It is an arithmetic number, because the mean of its divisors is an integer number (8487828).

Almost surely, 2^51870005 is an apocalyptic number.

51870005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51870005 is a deficient number, since it is larger than the sum of its proper divisors (16032619).

51870005 is a wasteful number, since it uses less digits than its factorization.

51870005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943107.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 51870005 is about 7202.0833791341. The cubic root of 51870005 is about 372.9398255057.

The spelling of 51870005 in words is "fifty-one million, eight hundred seventy thousand, five".