53171840 has 64 divisors (see below), whose sum is σ = 128005920. Its totient is φ = 21120000.

The previous prime is 53171749. The next prime is 53171843. The reversal of 53171840 is 4817135.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (53171843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160475 + ... + 160805.

Almost surely, 2^53171840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53171840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64002960).

53171840 is an abundant number, since it is smaller than the sum of its proper divisors (74834080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53171840 is a wasteful number, since it uses less digits than its factorization.

53171840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 53171840 is about 7291.9023580956. The cubic root of 53171840 is about 376.0340998197.

Adding to 53171840 its reverse (4817135), we get a palindrome (57988975).

The spelling of 53171840 in words is "fifty-three million, one hundred seventy-one thousand, eight hundred forty".