161181352 has 64 divisors (see below), whose sum is σ = 329313600. Its totient is φ = 73681920.

The previous prime is 161181347. The next prime is 161181353. The reversal of 161181352 is 253181161.

It is a super-4 number, since 4×161181352⁴ (a number of 34 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161181352.

It is not an unprimeable number, because it can be changed into a prime (161181353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230327 + ... + 1230457.

It is an arithmetic number, because the mean of its divisors is an integer number (5145525).

Almost surely, 2^161181352 is an apocalyptic number.

It is an amenable number.

161181352 is an abundant number, since it is smaller than the sum of its proper divisors (168132248).

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

161181352 is a wasteful number, since it uses less digits than its factorization.

161181352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 342 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 161181352 is about 12695.7217990944. The cubic root of 161181352 is about 544.2163661388.

The spelling of 161181352 in words is "one hundred sixty-one million, one hundred eighty-one thousand, three hundred fifty-two".