201520224544 has 48 divisors (see below), whose sum is σ = 406627070976. Its totient is φ = 98265126400.

The previous prime is 201520224541. The next prime is 201520224553. The reversal of 201520224544 is 445422025102.

It is a super-2 number, since 2×201520224544² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201520224541) 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, 184209 + ... + 661039.

It is an arithmetic number, because the mean of its divisors is an integer number (8471397312).

Almost surely, 2^201520224544 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 201520224544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203313535488).

201520224544 is an abundant number, since it is smaller than the sum of its proper divisors (205106846432).

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

201520224544 is a wasteful number, since it uses less digits than its factorization.

201520224544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477169 (or 477161 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 201520224544 its reverse (445422025102), we get a palindrome (646942249646).

The spelling of 201520224544 in words is "two hundred one billion, five hundred twenty million, two hundred twenty-four thousand, five hundred forty-four".