51053609 has 4 divisors (see below), whose sum is σ = 52139904. Its totient is φ = 49967316.

The previous prime is 51053603. The next prime is 51053617. The reversal of 51053609 is 90635015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51053609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51053603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543077 + ... + 543170.

It is an arithmetic number, because the mean of its divisors is an integer number (13034976).

Almost surely, 2^51053609 is an apocalyptic number.

It is an amenable number.

51053609 is a deficient number, since it is larger than the sum of its proper divisors (1086295).

51053609 is a wasteful number, since it uses less digits than its factorization.

51053609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086294.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 51053609 is about 7145.1808234642. The cubic root of 51053609 is about 370.9728694715.

The spelling of 51053609 in words is "fifty-one million, fifty-three thousand, six hundred nine".