201534601 has 4 divisors (see below), whose sum is σ = 208484100. Its totient is φ = 194585104.

The previous prime is 201534581. The next prime is 201534611. The reversal of 201534601 is 106435102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106435102 = 2 ⋅53217551.

It can be written as a sum of positive squares in 2 ways, for example, as 136328976 + 65205625 = 11676^2 + 8075^2 .

It is a cyclic number.

It is not a de Polignac number, because 201534601 - 2⁹ = 201534089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201534611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3474706 + ... + 3474763.

It is an arithmetic number, because the mean of its divisors is an integer number (52121025).

Almost surely, 2^201534601 is an apocalyptic number.

It is an amenable number.

201534601 is a deficient number, since it is larger than the sum of its proper divisors (6949499).

201534601 is an equidigital number, since it uses as much as digits as its factorization.

201534601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6949498.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 201534601 is about 14196.2882825054. The cubic root of 201534601 is about 586.2954717921.

Adding to 201534601 its reverse (106435102), we get a palindrome (307969703).

The spelling of 201534601 in words is "two hundred one million, five hundred thirty-four thousand, six hundred one".