56171651 has 4 divisors (see below), whose sum is σ = 56309400. Its totient is φ = 56033904.

The previous prime is 56171629. The next prime is 56171663. The reversal of 56171651 is 15617165.

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 56171651 - 2¹⁰ = 56170627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56171611) 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, 68261 + ... + 69078.

It is an arithmetic number, because the mean of its divisors is an integer number (14077350).

Almost surely, 2^56171651 is an apocalyptic number.

56171651 is a deficient number, since it is larger than the sum of its proper divisors (137749).

56171651 is a wasteful number, since it uses less digits than its factorization.

56171651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137748.

The product of its digits is 6300, while the sum is 32.

The square root of 56171651 is about 7494.7749132312. The cubic root of 56171651 is about 382.9767384928.

The spelling of 56171651 in words is "fifty-six million, one hundred seventy-one thousand, six hundred fifty-one".