52618220 has 24 divisors (see below), whose sum is σ = 116314800. Its totient is φ = 19939392.

The previous prime is 52618219. The next prime is 52618229. The reversal of 52618220 is 2281625.

It is a self number, because there is not a number n which added to its sum of digits gives 52618220.

It is not an unprimeable number, because it can be changed into a prime (52618229) 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, 68855 + ... + 69614.

It is an arithmetic number, because the mean of its divisors is an integer number (4846450).

Almost surely, 2^52618220 is an apocalyptic number.

It is an amenable number.

52618220 is an abundant number, since it is smaller than the sum of its proper divisors (63696580).

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

52618220 is a wasteful number, since it uses less digits than its factorization.

52618220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138497 (or 138495 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 52618220 is about 7253.8417407605. The cubic root of 52618220 is about 374.7244672304.

Adding to 52618220 its reverse (2281625), we get a palindrome (54899845).

The spelling of 52618220 in words is "fifty-two million, six hundred eighteen thousand, two hundred twenty".