56171311 has 8 divisors (see below), whose sum is σ = 64242464. Its totient is φ = 48111840.

The previous prime is 56171309. The next prime is 56171321. The reversal of 56171311 is 11317165.

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

It is not a de Polignac number, because 56171311 - 2¹ = 56171309 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 (56171321) 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, 13741 + ... + 17353.

It is an arithmetic number, because the mean of its divisors is an integer number (8030308).

Almost surely, 2^56171311 is an apocalyptic number.

56171311 is a deficient number, since it is larger than the sum of its proper divisors (8071153).

56171311 is a wasteful number, since it uses less digits than its factorization.

56171311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841.

The product of its digits is 630, while the sum is 25.

The square root of 56171311 is about 7494.7522307278. The cubic root of 56171311 is about 382.9759657877.

Adding to 56171311 its reverse (11317165), we get a palindrome (67488476).

The spelling of 56171311 in words is "fifty-six million, one hundred seventy-one thousand, three hundred eleven".