161532534 has 8 divisors (see below), whose sum is σ = 323065080. Its totient is φ = 53844176.

The previous prime is 161532529. The next prime is 161532541. The reversal of 161532534 is 435235161.

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

161532534 is an admirable number.

It is a super-2 number, since 2×161532534² = 52185519080922312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 13461039 + ... + 13461050.

It is an arithmetic number, because the mean of its divisors is an integer number (40383135).

Almost surely, 2^161532534 is an apocalyptic number.

161532534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161532534 is a wasteful number, since it uses less digits than its factorization.

161532534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26922094.

The product of its digits is 10800, while the sum is 30.

The square root of 161532534 is about 12709.5449957896. The cubic root of 161532534 is about 544.6113257167.

Adding to 161532534 its reverse (435235161), we get a palindrome (596767695).

The spelling of 161532534 in words is "one hundred sixty-one million, five hundred thirty-two thousand, five hundred thirty-four".