51671717 has 4 divisors (see below), whose sum is σ = 51838176. Its totient is φ = 51505260.

The previous prime is 51671713. The next prime is 51671729. The reversal of 51671717 is 71717615.

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 not a de Polignac number, because 51671717 - 2² = 51671713 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 (51671713) 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, 82763 + ... + 83384.

It is an arithmetic number, because the mean of its divisors is an integer number (12959544).

Almost surely, 2^51671717 is an apocalyptic number.

It is an amenable number.

51671717 is a deficient number, since it is larger than the sum of its proper divisors (166459).

51671717 is a wasteful number, since it uses less digits than its factorization.

51671717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166458.

The product of its digits is 10290, while the sum is 35.

The square root of 51671717 is about 7188.3041810986. The cubic root of 51671717 is about 372.4639954390.

The spelling of 51671717 in words is "fifty-one million, six hundred seventy-one thousand, seven hundred seventeen".