201511113216 has 320 divisors, whose sum is σ = 647135723520. Its totient is φ = 54433382400.

The previous prime is 201511113191. The next prime is 201511113277. The reversal of 201511113216 is 612311115102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175074241 + ... + 175075391.

It is an arithmetic number, because the mean of its divisors is an integer number (2022299136).

Almost surely, 2^201511113216 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 201511113216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323567861760).

201511113216 is an abundant number, since it is smaller than the sum of its proper divisors (445624610304).

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

201511113216 is a wasteful number, since it uses less digits than its factorization.

201511113216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

Adding to 201511113216 its reverse (612311115102), we get a palindrome (813822228318).

The spelling of 201511113216 in words is "two hundred one billion, five hundred eleven million, one hundred thirteen thousand, two hundred sixteen".