52170140 has 24 divisors (see below), whose sum is σ = 119517552. Its totient is φ = 18970880.

The previous prime is 52170119. The next prime is 52170149. The reversal of 52170140 is 4107125.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52170149) 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, 118349 + ... + 118788.

It is an arithmetic number, because the mean of its divisors is an integer number (4979898).

Almost surely, 2^52170140 is an apocalyptic number.

It is an amenable number.

52170140 is an abundant number, since it is smaller than the sum of its proper divisors (67347412).

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

52170140 is a wasteful number, since it uses less digits than its factorization.

52170140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237157 (or 237155 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 52170140 is about 7222.8900033158. The cubic root of 52170140 is about 373.6577554852.

Adding to 52170140 its reverse (4107125), we get a palindrome (56277265).

The spelling of 52170140 in words is "fifty-two million, one hundred seventy thousand, one hundred forty".