201081168 has 60 divisors (see below), whose sum is σ = 595858068. Its totient is φ = 63083520.

The previous prime is 201081143. The next prime is 201081173. The reversal of 201081168 is 861180102.

It can be written as a sum of positive squares in 2 ways, for example, as 80784144 + 120297024 = 8988^2 + 10968^2 .

It is a super-2 number, since 2×201081168² = 80867272248488448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38623 + ... + 43518.

Almost surely, 2^201081168 is an apocalyptic number.

It is an amenable number.

201081168 is an abundant number, since it is smaller than the sum of its proper divisors (394776900).

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

201081168 is a wasteful number, since it uses less digits than its factorization.

201081168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82172 (or 82163 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 201081168 is about 14180.3091644717. The cubic root of 201081168 is about 585.8554392642.

The spelling of 201081168 in words is "two hundred one million, eighty-one thousand, one hundred sixty-eight".