1601165203 has 16 divisors (see below), whose sum is σ = 1763596800. Its totient is φ = 1441614880.

The previous prime is 1601165177. The next prime is 1601165261. The reversal of 1601165203 is 3025611061.

It is a cyclic number.

It is not a de Polignac number, because 1601165203 - 2¹⁷ = 1601034131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601165003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528150 + ... + 531172.

It is an arithmetic number, because the mean of its divisors is an integer number (110224800).

Almost surely, 2^1601165203 is an apocalyptic number.

1601165203 is a deficient number, since it is larger than the sum of its proper divisors (162431597).

1601165203 is a wasteful number, since it uses less digits than its factorization.

1601165203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1601165203 is about 40014.5623867112. The cubic root of 1601165203 is about 1169.8909492440.

Adding to 1601165203 its reverse (3025611061), we get a palindrome (4626776264).

The spelling of 1601165203 in words is "one billion, six hundred one million, one hundred sixty-five thousand, two hundred three".