161173152 has 288 divisors, whose sum is σ = 565367040. Its totient is φ = 45069696.

The previous prime is 161173109. The next prime is 161173157. The reversal of 161173152 is 251371161.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (161173157) 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 47 ways as a sum of consecutive naturals, for example, 3429193 + ... + 3429239.

It is an arithmetic number, because the mean of its divisors is an integer number (1963080).

Almost surely, 2^161173152 is an apocalyptic number.

161173152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161173152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282683520).

161173152 is an abundant number, since it is smaller than the sum of its proper divisors (404193888).

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

161173152 is an frugal number, since it uses more digits than its factorization.

161173152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 59 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 161173152 is about 12695.3988515525. The cubic root of 161173152 is about 544.2071370937.

The spelling of 161173152 in words is "one hundred sixty-one million, one hundred seventy-three thousand, one hundred fifty-two".