201445135 has 4 divisors (see below), whose sum is σ = 241734168. Its totient is φ = 161156104.

The previous prime is 201445129. The next prime is 201445141. The reversal of 201445135 is 531544102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (201445129) and next prime (201445141).

It is a cyclic number.

It is not a de Polignac number, because 201445135 - 2²¹ = 199347983 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20144509 + ... + 20144518.

It is an arithmetic number, because the mean of its divisors is an integer number (60433542).

Almost surely, 2^201445135 is an apocalyptic number.

201445135 is a deficient number, since it is larger than the sum of its proper divisors (40289033).

201445135 is an equidigital number, since it uses as much as digits as its factorization.

201445135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40289032.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 201445135 is about 14193.1368978109. The cubic root of 201445135 is about 586.2087021189.

Adding to 201445135 its reverse (531544102), we get a palindrome (732989237).

The spelling of 201445135 in words is "two hundred one million, four hundred forty-five thousand, one hundred thirty-five".