56171665 has 8 divisors (see below), whose sum is σ = 73533888. Its totient is φ = 40852080.

The previous prime is 56171663. The next prime is 56171669. The reversal of 56171665 is 56617165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56171665 - 2¹ = 56171663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56171663) 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, 510597 + ... + 510706.

It is an arithmetic number, because the mean of its divisors is an integer number (9191736).

Almost surely, 2^56171665 is an apocalyptic number.

56171665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56171665 is a deficient number, since it is larger than the sum of its proper divisors (17362223).

56171665 is a wasteful number, since it uses less digits than its factorization.

56171665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021319.

The product of its digits is 37800, while the sum is 37.

The square root of 56171665 is about 7494.7758472152. The cubic root of 56171665 is about 382.9767703100.

The spelling of 56171665 in words is "fifty-six million, one hundred seventy-one thousand, six hundred sixty-five".