201102444 has 72 divisors (see below), whose sum is σ = 524443920. Its totient is φ = 64945152.

The previous prime is 201102431. The next prime is 201102449. The reversal of 201102444 is 444201102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201102449) 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, 154404 + ... + 155700.

Almost surely, 2^201102444 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 201102444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262221960).

201102444 is an abundant number, since it is smaller than the sum of its proper divisors (323341476).

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

201102444 is a wasteful number, since it uses less digits than its factorization.

201102444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 201102444 is about 14181.0593398378. The cubic root of 201102444 is about 585.8761012699.

Adding to 201102444 its reverse (444201102), we get a palindrome (645303546).

The spelling of 201102444 in words is "two hundred one million, one hundred two thousand, four hundred forty-four".