201115216530 has 48 divisors (see below), whose sum is σ = 539767298304. Its totient is φ = 51900700320.

The previous prime is 201115216517. The next prime is 201115216579. The reversal of 201115216530 is 35612511102.

201115216530 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 1 + 5 + 2 + 1 + 653 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 201115216494 and 201115216503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36039364 + ... + 36044943.

It is an arithmetic number, because the mean of its divisors is an integer number (11245152048).

Almost surely, 2^201115216530 is an apocalyptic number.

201115216530 is an abundant number, since it is smaller than the sum of its proper divisors (338652081774).

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

201115216530 is a wasteful number, since it uses less digits than its factorization.

201115216530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72084351 (or 72084348 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 201115216530 its reverse (35612511102), we get a palindrome (236727727632).

The spelling of 201115216530 in words is "two hundred one billion, one hundred fifteen million, two hundred sixteen thousand, five hundred thirty".