51875509 has 8 divisors (see below), whose sum is σ = 59387328. Its totient is φ = 44388960.

The previous prime is 51875497. The next prime is 51875521. The reversal of 51875509 is 90557815.

It is an interprime number because it is at equal distance from previous prime (51875497) and next prime (51875521).

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

It is not a de Polignac number, because 51875509 - 2¹¹ = 51873461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51875569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (7423416).

Almost surely, 2^51875509 is an apocalyptic number.

It is an amenable number.

51875509 is a deficient number, since it is larger than the sum of its proper divisors (7511819).

51875509 is a wasteful number, since it uses less digits than its factorization.

51875509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12635.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 51875509 is about 7202.4654806531. The cubic root of 51875509 is about 372.9530160976.

The spelling of 51875509 in words is "fifty-one million, eight hundred seventy-five thousand, five hundred nine".