201301201605 has 128 divisors (see below), whose sum is σ = 390946590720. Its totient is φ = 86489303040.

The previous prime is 201301201603. The next prime is 201301201627. The reversal of 201301201605 is 506102103102.

It is not a de Polignac number, because 201301201605 - 2¹ = 201301201603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201301201603) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 65292394 + ... + 65295476.

It is an arithmetic number, because the mean of its divisors is an integer number (3054270240).

Almost surely, 2^201301201605 is an apocalyptic number.

It is an amenable number.

201301201605 is a deficient number, since it is larger than the sum of its proper divisors (189645389115).

201301201605 is a wasteful number, since it uses less digits than its factorization.

201301201605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 201301201605 its reverse (506102103102), we get a palindrome (707403304707).

The spelling of 201301201605 in words is "two hundred one billion, three hundred one million, two hundred one thousand, six hundred five".