52145340 has 48 divisors (see below), whose sum is σ = 157240608. Its totient is φ = 12835584.

The previous prime is 52145339. The next prime is 52145389. The reversal of 52145340 is 4354125.

It is a self number, because there is not a number n which added to its sum of digits gives 52145340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32647 + ... + 34206.

It is an arithmetic number, because the mean of its divisors is an integer number (3275846).

Almost surely, 2^52145340 is an apocalyptic number.

It is an amenable number.

52145340 is an abundant number, since it is smaller than the sum of its proper divisors (105095268).

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

52145340 is a wasteful number, since it uses less digits than its factorization.

52145340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66878 (or 66876 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 52145340 is about 7221.1730349023. The cubic root of 52145340 is about 373.5985378236.

Adding to 52145340 its reverse (4354125), we get a palindrome (56499465).

The spelling of 52145340 in words is "fifty-two million, one hundred forty-five thousand, three hundred forty".