161317270 has 16 divisors (see below), whose sum is σ = 290563200. Its totient is φ = 64484224.

The previous prime is 161317259. The next prime is 161317271. The reversal of 161317270 is 72713161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161317271) 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 7 ways as a sum of consecutive naturals, for example, 13806 + ... + 22654.

It is an arithmetic number, because the mean of its divisors is an integer number (18160200).

Almost surely, 2^161317270 is an apocalyptic number.

161317270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161317270 is a deficient number, since it is larger than the sum of its proper divisors (129245930).

161317270 is a wasteful number, since it uses less digits than its factorization.

161317270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 161317270 is about 12701.0735766706. The cubic root of 161317270 is about 544.3692953645.

The spelling of 161317270 in words is "one hundred sixty-one million, three hundred seventeen thousand, two hundred seventy".