52621240 has 64 divisors (see below), whose sum is σ = 141212160. Its totient is φ = 17255040.

The previous prime is 52621213. The next prime is 52621243. The reversal of 52621240 is 4212625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2355 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (2206440).

Almost surely, 2^52621240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52621240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70606080).

52621240 is an abundant number, since it is smaller than the sum of its proper divisors (88590920).

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

52621240 is a wasteful number, since it uses less digits than its factorization.

52621240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212 (or 8208 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 52621240 is about 7254.0499033299. The cubic root of 52621240 is about 374.7316361429.

Adding to 52621240 its reverse (4212625), we get a palindrome (56833865).

The spelling of 52621240 in words is "fifty-two million, six hundred twenty-one thousand, two hundred forty".