52171240 has 32 divisors (see below), whose sum is σ = 128057760. Its totient is φ = 18971200.

The previous prime is 52171237. The next prime is 52171241. The reversal of 52171240 is 4217125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (52171241) 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, 58846 + ... + 59725.

It is an arithmetic number, because the mean of its divisors is an integer number (4001805).

Almost surely, 2^52171240 is an apocalyptic number.

It is an amenable number.

52171240 is an abundant number, since it is smaller than the sum of its proper divisors (75886520).

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

52171240 is a wasteful number, since it uses less digits than its factorization.

52171240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118593 (or 118589 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 52171240 is about 7222.9661497199. The cubic root of 52171240 is about 373.6603816404.

Adding to 52171240 its reverse (4217125), we get a palindrome (56388365).

The spelling of 52171240 in words is "fifty-two million, one hundred seventy-one thousand, two hundred forty".