9815522112 has 224 divisors, whose sum is σ = 32151767040. Its totient is φ = 2910850560.

The previous prime is 9815522083. The next prime is 9815522131. The reversal of 9815522112 is 2112255189.

9815522112 is a `hidden beast` number, since 9 + 8 + 15 + 522 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 887883 + ... + 898869.

Almost surely, 2^9815522112 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 9815522112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16075883520).

9815522112 is an abundant number, since it is smaller than the sum of its proper divisors (22336244928).

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

9815522112 is a wasteful number, since it uses less digits than its factorization.

9815522112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066 (or 11050 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 9815522112 is about 99073.3168517134. The cubic root of 9815522112 is about 2141.1041927332.

The spelling of 9815522112 in words is "nine billion, eight hundred fifteen million, five hundred twenty-two thousand, one hundred twelve".