52171940 has 24 divisors (see below), whose sum is σ = 109697280. Its totient is φ = 20842848.

The previous prime is 52171937. The next prime is 52171949. The reversal of 52171940 is 4917125.

It is a super-2 number, since 2×52171940² = 5443822646727200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52171949) 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, 28781 + ... + 30539.

It is an arithmetic number, because the mean of its divisors is an integer number (4570720).

Almost surely, 2^52171940 is an apocalyptic number.

It is an amenable number.

52171940 is an abundant number, since it is smaller than the sum of its proper divisors (57525340).

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

52171940 is a wasteful number, since it uses less digits than its factorization.

52171940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 52171940 is about 7223.0146061046. The cubic root of 52171940 is about 373.6620528108.

The spelling of 52171940 in words is "fifty-two million, one hundred seventy-one thousand, nine hundred forty".