51171707 has 4 divisors (see below), whose sum is σ = 51746760. Its totient is φ = 50596656.

The previous prime is 51171691. The next prime is 51171709. The reversal of 51171707 is 70717115.

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

It is a cyclic number.

It is not a de Polignac number, because 51171707 - 2⁴ = 51171691 is a prime.

It is a super-4 number, since 4×51171707⁴ (a number of 32 digits) contains 4444 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 51171707.

It is not an unprimeable number, because it can be changed into a prime (51171709) 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, 287393 + ... + 287570.

It is an arithmetic number, because the mean of its divisors is an integer number (12936690).

Almost surely, 2^51171707 is an apocalyptic number.

51171707 is a deficient number, since it is larger than the sum of its proper divisors (575053).

51171707 is an equidigital number, since it uses as much as digits as its factorization.

51171707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575052.

The product of its (nonzero) digits is 1715, while the sum is 29.

The square root of 51171707 is about 7153.4402213201. The cubic root of 51171707 is about 371.2586959233.

The spelling of 51171707 in words is "fifty-one million, one hundred seventy-one thousand, seven hundred seven".