161204532 has 24 divisors (see below), whose sum is σ = 376718496. Its totient is φ = 53652768.

The previous prime is 161204521. The next prime is 161204551. The reversal of 161204532 is 235402161.

161204532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161204532² = 51973802274678048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798 + ... + 18045.

It is an arithmetic number, because the mean of its divisors is an integer number (15696604).

Almost surely, 2^161204532 is an apocalyptic number.

161204532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161204532 is an abundant number, since it is smaller than the sum of its proper divisors (215513964).

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

161204532 is a wasteful number, since it uses less digits than its factorization.

161204532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20527 (or 20525 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 161204532 is about 12696.6346722271. The cubic root of 161204532 is about 544.2424533805.

Adding to 161204532 its reverse (235402161), we get a palindrome (396606693).

The spelling of 161204532 in words is "one hundred sixty-one million, two hundred four thousand, five hundred thirty-two".