201511996 has 24 divisors (see below), whose sum is σ = 406596960. Its totient is φ = 85596672.

The previous prime is 201511991. The next prime is 201512009. The reversal of 201511996 is 699115102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201511991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28681 + ... + 35008.

It is an arithmetic number, because the mean of its divisors is an integer number (16941540).

Almost surely, 2^201511996 is an apocalyptic number.

It is an amenable number.

201511996 is an abundant number, since it is smaller than the sum of its proper divisors (205084964).

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

201511996 is a wasteful number, since it uses less digits than its factorization.

201511996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63813 (or 63811 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 201511996 is about 14195.4921013680. The cubic root of 201511996 is about 586.2735504865.

The spelling of 201511996 in words is "two hundred one million, five hundred eleven thousand, nine hundred ninety-six".