201551144 has 16 divisors (see below), whose sum is σ = 379562100. Its totient is φ = 100334592.

The previous prime is 201551117. The next prime is 201551149. The reversal of 201551144 is 441155102.

201551144 is digitally balanced in base 3, 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 165431044 + 36120100 = 12862^2 + 6010^2 .

It is not an unprimeable number, because it can be changed into a prime (201551149) 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 3 ways as a sum of consecutive naturals, for example, 53177 + ... + 56840.

Almost surely, 2^201551144 is an apocalyptic number.

It is an amenable number.

201551144 is a deficient number, since it is larger than the sum of its proper divisors (178010956).

201551144 is a wasteful number, since it uses less digits than its factorization.

201551144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110252 (or 110248 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 201551144 is about 14196.8709228478. The cubic root of 201551144 is about 586.3115134057.

The spelling of 201551144 in words is "two hundred one million, five hundred fifty-one thousand, one hundred forty-four".