201161956 has 12 divisors (see below), whose sum is σ = 367339392. Its totient is φ = 96207848.

The previous prime is 201161903. The next prime is 201161959. The reversal of 201161956 is 659161102.

201161956 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201161956² = 80932265083491872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201161959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093180 + ... + 1093363.

It is an arithmetic number, because the mean of its divisors is an integer number (30611616).

Almost surely, 2^201161956 is an apocalyptic number.

It is an amenable number.

201161956 is a deficient number, since it is larger than the sum of its proper divisors (166177436).

201161956 is a wasteful number, since it uses less digits than its factorization.

201161956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186570 (or 2186568 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 201161956 is about 14183.1574763873. The cubic root of 201161956 is about 585.9338881024.

The spelling of 201161956 in words is "two hundred one million, one hundred sixty-one thousand, nine hundred fifty-six".