51605059 has 4 divisors (see below), whose sum is σ = 56296440. Its totient is φ = 46913680.

The previous prime is 51605039. The next prime is 51605063. The reversal of 51605059 is 95050615.

It is a happy number.

51605059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51605059 - 2⁹ = 51604547 is a prime.

It is a super-2 number, since 2×51605059² = 5326164228786962, which contains 22 as substring.

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 51605059.

It is not an unprimeable number, because it can be changed into a prime (51605009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345674 + ... + 2345695.

It is an arithmetic number, because the mean of its divisors is an integer number (14074110).

Almost surely, 2^51605059 is an apocalyptic number.

51605059 is a deficient number, since it is larger than the sum of its proper divisors (4691381).

51605059 is a wasteful number, since it uses less digits than its factorization.

51605059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691380.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 51605059 is about 7183.6661253151. Note that the first 3 decimals coincide. The cubic root of 51605059 is about 372.3037634316.

The spelling of 51605059 in words is "fifty-one million, six hundred five thousand, fifty-nine".