201201156 has 36 divisors (see below), whose sum is σ = 547715532. Its totient is φ = 61907904.

The previous prime is 201201131. The next prime is 201201167. The reversal of 201201156 is 651102102.

201201156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 162562500 = 6216^2 + 12750^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214491 + ... + 215426.

Almost surely, 2^201201156 is an apocalyptic number.

201201156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

201201156 is an abundant number, since it is smaller than the sum of its proper divisors (346514376).

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

201201156 is a wasteful number, since it uses less digits than its factorization.

201201156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429940 (or 429935 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 201201156 is about 14184.5393298478. The cubic root of 201201156 is about 585.9719455249.

Adding to 201201156 its reverse (651102102), we get a palindrome (852303258).

The spelling of 201201156 in words is "two hundred one million, two hundred one thousand, one hundred fifty-six".