52171380 has 36 divisors (see below), whose sum is σ = 158253732. Its totient is φ = 13912320.

The previous prime is 52171367. The next prime is 52171387. The reversal of 52171380 is 8317125.

52171380 is a `hidden beast` number, since 521 + 7 + 138 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 19131876 = 5748^2 + 4374^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×52171380² = 5443705782208800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52171387) 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 11 ways as a sum of consecutive naturals, for example, 144741 + ... + 145100.

It is an arithmetic number, because the mean of its divisors is an integer number (4395937).

Almost surely, 2^52171380 is an apocalyptic number.

It is an amenable number.

52171380 is an abundant number, since it is smaller than the sum of its proper divisors (106082352).

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

52171380 is a wasteful number, since it uses less digits than its factorization.

52171380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289856 (or 289851 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 52171380 is about 7222.9758410229. The cubic root of 52171380 is about 373.6607158756.

The spelling of 52171380 in words is "fifty-two million, one hundred seventy-one thousand, three hundred eighty".