51605071 has 8 divisors (see below), whose sum is σ = 59203584. Its totient is φ = 44063160.

The previous prime is 51605063. The next prime is 51605131. The reversal of 51605071 is 17050615.

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 51605071 - 2³ = 51605063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51605011) 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, 12175 + ... + 15856.

It is an arithmetic number, because the mean of its divisors is an integer number (7400448).

Almost surely, 2^51605071 is an apocalyptic number.

51605071 is a deficient number, since it is larger than the sum of its proper divisors (7598513).

51605071 is a wasteful number, since it uses less digits than its factorization.

51605071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28301.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 51605071 is about 7183.6669605432. Note that the first 3 decimals coincide. The cubic root of 51605071 is about 372.3037922896.

Adding to 51605071 its reverse (17050615), we get a palindrome (68655686).

The spelling of 51605071 in words is "fifty-one million, six hundred five thousand, seventy-one".