161530135 has 16 divisors (see below), whose sum is σ = 212173920. Its totient is φ = 117325440.

The previous prime is 161530133. The next prime is 161530147. The reversal of 161530135 is 531035161.

It is not a de Polignac number, because 161530135 - 2¹ = 161530133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161530133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16405 + ... + 24334.

It is an arithmetic number, because the mean of its divisors is an integer number (13260870).

Almost surely, 2^161530135 is an apocalyptic number.

161530135 is a deficient number, since it is larger than the sum of its proper divisors (50643785).

161530135 is a wasteful number, since it uses less digits than its factorization.

161530135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40818.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 161530135 is about 12709.4506175523. The cubic root of 161530135 is about 544.6086296055.

Adding to 161530135 its reverse (531035161), we get a palindrome (692565296).

The spelling of 161530135 in words is "one hundred sixty-one million, five hundred thirty thousand, one hundred thirty-five".