201155450 has 12 divisors (see below), whose sum is σ = 374149230. Its totient is φ = 80462160.

The previous prime is 201155411. The next prime is 201155453. The reversal of 201155450 is 54551102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 88604569 + 112550881 = 9413^2 + 10609^2 .

It is not an unprimeable number, because it can be changed into a prime (201155453) 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 5 ways as a sum of consecutive naturals, for example, 2011505 + ... + 2011604.

Almost surely, 2^201155450 is an apocalyptic number.

201155450 is a deficient number, since it is larger than the sum of its proper divisors (172993780).

201155450 is a wasteful number, since it uses less digits than its factorization.

201155450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023121 (or 4023116 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 201155450 is about 14182.9281179875. The cubic root of 201155450 is about 585.9275712569.

The spelling of 201155450 in words is "two hundred one million, one hundred fifty-five thousand, four hundred fifty".