161513135 has 16 divisors (see below), whose sum is σ = 223104000. Its totient is φ = 109951776.

The previous prime is 161513119. The next prime is 161513147. The reversal of 161513135 is 531315161.

It is a cyclic number.

It is not a de Polignac number, because 161513135 - 2⁴ = 161513119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11735 + ... + 21464.

It is an arithmetic number, because the mean of its divisors is an integer number (13944000).

Almost surely, 2^161513135 is an apocalyptic number.

161513135 is a deficient number, since it is larger than the sum of its proper divisors (61590865).

161513135 is a wasteful number, since it uses less digits than its factorization.

161513135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33350.

The product of its digits is 1350, while the sum is 26.

The square root of 161513135 is about 12708.7818062944. The cubic root of 161513135 is about 544.5895234255.

Adding to 161513135 its reverse (531315161), we get a palindrome (692828296).

It can be divided in two parts, 16 and 1513135, that added together give a palindrome (1513151).

The spelling of 161513135 in words is "one hundred sixty-one million, five hundred thirteen thousand, one hundred thirty-five".