51501875 has 20 divisors (see below), whose sum is σ = 67759560. Its totient is φ = 39024000.

The previous prime is 51501869. The next prime is 51501887. The reversal of 51501875 is 57810515.

It is a happy number.

It is not a de Polignac number, because 51501875 - 2⁶ = 51501811 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9707 + ... + 14043.

It is an arithmetic number, because the mean of its divisors is an integer number (3387978).

Almost surely, 2^51501875 is an apocalyptic number.

51501875 is a deficient number, since it is larger than the sum of its proper divisors (16257685).

51501875 is an equidigital number, since it uses as much as digits as its factorization.

51501875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376 (or 4361 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 51501875 is about 7176.4806834548. The cubic root of 51501875 is about 372.0554581634.

The spelling of 51501875 in words is "fifty-one million, five hundred one thousand, eight hundred seventy-five".