161500534 has 8 divisors (see below), whose sum is σ = 260885520. Its totient is φ = 74538696.

The previous prime is 161500531. The next prime is 161500543. The reversal of 161500534 is 435005161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 161500499 and 161500508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3105754 + ... + 3105805.

It is an arithmetic number, because the mean of its divisors is an integer number (32610690).

Almost surely, 2^161500534 is an apocalyptic number.

161500534 is a deficient number, since it is larger than the sum of its proper divisors (99384986).

161500534 is a wasteful number, since it uses less digits than its factorization.

161500534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211574.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 161500534 is about 12708.2860370705. The cubic root of 161500534 is about 544.5753603853.

Adding to 161500534 its reverse (435005161), we get a palindrome (596505695).

The spelling of 161500534 in words is "one hundred sixty-one million, five hundred thousand, five hundred thirty-four".