201115812 has 24 divisors (see below), whose sum is σ = 485452800. Its totient is φ = 64726816.

The previous prime is 201115799. The next prime is 201115813. The reversal of 201115812 is 218511102.

It is not an unprimeable number, because it can be changed into a prime (201115813) 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, 288612 + ... + 289307.

It is an arithmetic number, because the mean of its divisors is an integer number (20227200).

Almost surely, 2^201115812 is an apocalyptic number.

It is an amenable number.

201115812 is an abundant number, since it is smaller than the sum of its proper divisors (284336988).

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

201115812 is a wasteful number, since it uses less digits than its factorization.

201115812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577955 (or 577953 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 201115812 is about 14181.5306649177. The cubic root of 201115812 is about 585.8890827435.

Adding to 201115812 its reverse (218511102), we get a palindrome (419626914).

The spelling of 201115812 in words is "two hundred one million, one hundred fifteen thousand, eight hundred twelve".