201643552 has 48 divisors (see below), whose sum is σ = 440221824. Its totient is φ = 90144000.

The previous prime is 201643549. The next prime is 201643567. The reversal of 201643552 is 255346102.

It is a self number, because there is not a number n which added to its sum of digits gives 201643552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16777 + ... + 26167.

It is an arithmetic number, because the mean of its divisors is an integer number (9171288).

Almost surely, 2^201643552 is an apocalyptic number.

201643552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201643552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220110912).

201643552 is an abundant number, since it is smaller than the sum of its proper divisors (238578272).

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

201643552 is a wasteful number, since it uses less digits than its factorization.

201643552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473 (or 9465 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 201643552 is about 14200.1250698717. The cubic root of 201643552 is about 586.4011045556.

Adding to 201643552 its reverse (255346102), we get a palindrome (456989654).

It can be divided in two parts, 20164 and 3552, that added together give a square (23716 = 154²).

The spelling of 201643552 in words is "two hundred one million, six hundred forty-three thousand, five hundred fifty-two".