52415220 has 192 divisors, whose sum is σ = 177811200. Its totient is φ = 11366400.

The previous prime is 52415219. The next prime is 52415221. The reversal of 52415220 is 2251425.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52415219) and next prime (52415221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52415221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 351706 + ... + 351854.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^52415220 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 52415220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88905600).

52415220 is an abundant number, since it is smaller than the sum of its proper divisors (125395980).

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

52415220 is a wasteful number, since it uses less digits than its factorization.

52415220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 52415220 is about 7239.8356334933. The cubic root of 52415220 is about 374.2419531168.

Adding to 52415220 its reverse (2251425), we get a palindrome (54666645).

The spelling of 52415220 in words is "fifty-two million, four hundred fifteen thousand, two hundred twenty".