51168085 has 4 divisors (see below), whose sum is σ = 61401708. Its totient is φ = 40934464.

The previous prime is 51168071. The next prime is 51168097. The reversal of 51168085 is 58086115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40883236 + 10284849 = 6394^2 + 3207^2 .

It is a cyclic number.

It is not a de Polignac number, because 51168085 - 2⁷ = 51167957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51168085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116804 + ... + 5116813.

It is an arithmetic number, because the mean of its divisors is an integer number (15350427).

Almost surely, 2^51168085 is an apocalyptic number.

It is an amenable number.

51168085 is a deficient number, since it is larger than the sum of its proper divisors (10233623).

51168085 is a wasteful number, since it uses less digits than its factorization.

51168085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10233622.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 51168085 is about 7153.1870519371. The cubic root of 51168085 is about 371.2499363255.

The spelling of 51168085 in words is "fifty-one million, one hundred sixty-eight thousand, eighty-five".