201224550 has 48 divisors (see below), whose sum is σ = 504677520. Its totient is φ = 53053440.

The previous prime is 201224467. The next prime is 201224557. The reversal of 201224550 is 55422102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201224557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5814 + ... + 20886.

It is an arithmetic number, because the mean of its divisors is an integer number (10514115).

Almost surely, 2^201224550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201224550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252338760).

201224550 is an abundant number, since it is smaller than the sum of its proper divisors (303452970).

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

201224550 is a wasteful number, since it uses less digits than its factorization.

201224550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15177 (or 15172 counting only the distinct ones).

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

The square root of 201224550 is about 14185.3639361139. The cubic root of 201224550 is about 585.9946552957.

Adding to 201224550 its reverse (55422102), we get a palindrome (256646652).

It can be divided in two parts, 2012 and 24550, that added together give a palindrome (26562).

The spelling of 201224550 in words is "two hundred one million, two hundred twenty-four thousand, five hundred fifty".