161102281 has 8 divisors (see below), whose sum is σ = 170864064. Its totient is φ = 151570320.

The previous prime is 161102261. The next prime is 161102287. The reversal of 161102281 is 182201161.

161102281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161102281 - 2⁷ = 161102153 is a prime.

It is a super-2 number, since 2×161102281² = 51907889886805922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161102287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56011 + ... + 58816.

It is an arithmetic number, because the mean of its divisors is an integer number (21358008).

Almost surely, 2^161102281 is an apocalyptic number.

It is an amenable number.

161102281 is a deficient number, since it is larger than the sum of its proper divisors (9761783).

161102281 is a wasteful number, since it uses less digits than its factorization.

161102281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114911.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 161102281 is about 12692.6073365562. The cubic root of 161102281 is about 544.1273592109.

The spelling of 161102281 in words is "one hundred sixty-one million, one hundred two thousand, two hundred eighty-one".