201645135 has 12 divisors (see below), whose sum is σ = 349518312. Its totient is φ = 107544048.

The previous prime is 201645113. The next prime is 201645137. The reversal of 201645135 is 531546102.

201645135 is a `hidden beast` number, since 2 + 0 + 1 + 645 + 13 + 5 = 666.

It is not a de Polignac number, because 201645135 - 2⁸ = 201644879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201645099 and 201645108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201645137) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2240457 + ... + 2240546.

It is an arithmetic number, because the mean of its divisors is an integer number (29126526).

Almost surely, 2^201645135 is an apocalyptic number.

201645135 is a deficient number, since it is larger than the sum of its proper divisors (147873177).

201645135 is a wasteful number, since it uses less digits than its factorization.

201645135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481014 (or 4481011 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 201645135 is about 14200.1808087080. The cubic root of 201645135 is about 586.4026390629.

The spelling of 201645135 in words is "two hundred one million, six hundred forty-five thousand, one hundred thirty-five".