161522368 has 28 divisors (see below), whose sum is σ = 366310672. Its totient is φ = 69223680.

The previous prime is 161522359. The next prime is 161522371. The reversal of 161522368 is 863225161.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179823 + ... + 180718.

It is an arithmetic number, because the mean of its divisors is an integer number (13082524).

Almost surely, 2^161522368 is an apocalyptic number.

It is an amenable number.

161522368 is an abundant number, since it is smaller than the sum of its proper divisors (204788304).

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

161522368 is an equidigital number, since it uses as much as digits as its factorization.

161522368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360560 (or 360550 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 161522368 is about 12709.1450538579. The cubic root of 161522368 is about 544.5999004953.

The spelling of 161522368 in words is "one hundred sixty-one million, five hundred twenty-two thousand, three hundred sixty-eight".