161457216 has 28 divisors (see below), whose sum is σ = 427189392. Its totient is φ = 53819008.

The previous prime is 161457209. The next prime is 161457251. The reversal of 161457216 is 612754161.

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, 420270 + ... + 420653.

It is an arithmetic number, because the mean of its divisors is an integer number (15256764).

Almost surely, 2^161457216 is an apocalyptic number.

161457216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161457216 is an abundant number, since it is smaller than the sum of its proper divisors (265732176).

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

161457216 is an equidigital number, since it uses as much as digits as its factorization.

161457216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840938 (or 840928 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 161457216 is about 12706.5816016740. The cubic root of 161457216 is about 544.5266669965.

The spelling of 161457216 in words is "one hundred sixty-one million, four hundred fifty-seven thousand, two hundred sixteen".