201135442 has 4 divisors (see below), whose sum is σ = 301703166. Its totient is φ = 100567720.

The previous prime is 201135433. The next prime is 201135443. The reversal of 201135442 is 244531102.

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

It can be written as a sum of positive squares in only one way, i.e., 129072321 + 72063121 = 11361^2 + 8489^2 .

It is not an unprimeable number, because it can be changed into a prime (201135443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50283859 + ... + 50283862.

Almost surely, 2^201135442 is an apocalyptic number.

201135442 is a deficient number, since it is larger than the sum of its proper divisors (100567724).

201135442 is a wasteful number, since it uses less digits than its factorization.

201135442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100567723.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 201135442 is about 14182.2227453950. Note that the first 3 decimals coincide. The cubic root of 201135442 is about 585.9081441132.

Adding to 201135442 its reverse (244531102), we get a palindrome (445666544).

The spelling of 201135442 in words is "two hundred one million, one hundred thirty-five thousand, four hundred forty-two".