201540613 has 12 divisors (see below), whose sum is σ = 209149248. Its totient is φ = 194103000.

The previous prime is 201540601. The next prime is 201540643. The reversal of 201540613 is 316045102.

It is a de Polignac number, because none of the positive numbers 2^k-201540613 is a prime.

It is the 14197-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201540643) by changing a digit.

It is a nontrivial repunit in base 14196.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267988 + ... + 268738.

It is an arithmetic number, because the mean of its divisors is an integer number (17429104).

Almost surely, 2^201540613 is an apocalyptic number.

It is an amenable number.

201540613 is a deficient number, since it is larger than the sum of its proper divisors (7608635).

201540613 is an frugal number, since it uses more digits than its factorization.

201540613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 873 counting only the distinct ones).

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

The square root of 201540613 is about 14196.5000264150. The cubic root of 201540613 is about 586.3013016815.

Adding to 201540613 its reverse (316045102), we get a palindrome (517585715).

The spelling of 201540613 in words is "two hundred one million, five hundred forty thousand, six hundred thirteen".