51605117 has 8 divisors (see below), whose sum is σ = 53702880. Its totient is φ = 49548240.

The previous prime is 51605063. The next prime is 51605131. The reversal of 51605117 is 71150615.

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 51605117 - 2¹⁰ = 51604093 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 (51605017) 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, 7634 + ... + 12707.

It is an arithmetic number, because the mean of its divisors is an integer number (6712860).

Almost surely, 2^51605117 is an apocalyptic number.

It is an amenable number.

51605117 is a deficient number, since it is larger than the sum of its proper divisors (2097763).

51605117 is a wasteful number, since it uses less digits than its factorization.

51605117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20443.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 51605117 is about 7183.6701622499. The cubic root of 51605117 is about 372.3039029116.

The spelling of 51605117 in words is "fifty-one million, six hundred five thousand, one hundred seventeen".