51575251 has 12 divisors (see below), whose sum is σ = 63827472. Its totient is φ = 40805856.

The previous prime is 51575231. The next prime is 51575261. The reversal of 51575251 is 15257515.

It is not a de Polignac number, because 51575251 - 2⁷ = 51575123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51575231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20616 + ... + 22981.

It is an arithmetic number, because the mean of its divisors is an integer number (5318956).

Almost surely, 2^51575251 is an apocalyptic number.

51575251 is a deficient number, since it is larger than the sum of its proper divisors (12252221).

51575251 is a wasteful number, since it uses less digits than its factorization.

51575251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43630 (or 43617 counting only the distinct ones).

The product of its digits is 8750, while the sum is 31.

The square root of 51575251 is about 7181.5911189652. The cubic root of 51575251 is about 372.2320665334.

The spelling of 51575251 in words is "fifty-one million, five hundred seventy-five thousand, two hundred fifty-one".