201109249 has 16 divisors (see below), whose sum is σ = 223534080. Its totient is φ = 179406160.

The previous prime is 201109211. The next prime is 201109267. The reversal of 201109249 is 942901102.

It is a happy number.

It is not a de Polignac number, because 201109249 - 2⁹ = 201108737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201109289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151812 + ... + 153130.

It is an arithmetic number, because the mean of its divisors is an integer number (13970880).

Almost surely, 2^201109249 is an apocalyptic number.

It is an amenable number.

201109249 is a deficient number, since it is larger than the sum of its proper divisors (22424831).

201109249 is a wasteful number, since it uses less digits than its factorization.

201109249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 201109249 is about 14181.2992705182. The cubic root of 201109249 is about 585.8827095799.

The spelling of 201109249 in words is "two hundred one million, one hundred nine thousand, two hundred forty-nine".