51575501 has 8 divisors (see below), whose sum is σ = 54706104. Its totient is φ = 48455680.

The previous prime is 51575479. The next prime is 51575509. The reversal of 51575501 is 10557515.

It can be written as a sum of positive squares in 4 ways, for example, as 16410601 + 35164900 = 4051^2 + 5930^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51575501 - 2⁶ = 51575437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51575509) 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, 8531 + ... + 13263.

It is an arithmetic number, because the mean of its divisors is an integer number (6838263).

Almost surely, 2^51575501 is an apocalyptic number.

It is an amenable number.

51575501 is a deficient number, since it is larger than the sum of its proper divisors (3130603).

51575501 is a wasteful number, since it uses less digits than its factorization.

51575501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391.

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 51575501 is about 7181.6085245577. The cubic root of 51575501 is about 372.2326679708.

The spelling of 51575501 in words is "fifty-one million, five hundred seventy-five thousand, five hundred one".