52305140 has 12 divisors (see below), whose sum is σ = 109840836. Its totient is φ = 20922048.

The previous prime is 52305133. The next prime is 52305163. The reversal of 52305140 is 4150325.

It can be written as a sum of positive squares in 2 ways, for example, as 25140196 + 27164944 = 5014^2 + 5212^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2615257 = 52305140 / (5 + 2 + 3 + 0 + 5 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307609 + ... + 1307648.

It is an arithmetic number, because the mean of its divisors is an integer number (9153403).

Almost surely, 2^52305140 is an apocalyptic number.

It is an amenable number.

52305140 is an abundant number, since it is smaller than the sum of its proper divisors (57535696).

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

52305140 is a wasteful number, since it uses less digits than its factorization.

52305140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615266 (or 2615264 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 52305140 is about 7232.2292552158. The cubic root of 52305140 is about 373.9797809997.

Adding to 52305140 its reverse (4150325), we get a palindrome (56455465).

The spelling of 52305140 in words is "fifty-two million, three hundred five thousand, one hundred forty".