161053111 has 4 divisors (see below), whose sum is σ = 163259392. Its totient is φ = 158846832.

The previous prime is 161053097. The next prime is 161053141. The reversal of 161053111 is 111350161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111350161 = 13 ⋅8565397.

It is not a de Polignac number, because 161053111 - 2⁹ = 161052599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161053141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103031 + ... + 1103176.

It is an arithmetic number, because the mean of its divisors is an integer number (40814848).

Almost surely, 2^161053111 is an apocalyptic number.

161053111 is a deficient number, since it is larger than the sum of its proper divisors (2206281).

161053111 is an equidigital number, since it uses as much as digits as its factorization.

161053111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206280.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 161053111 is about 12690.6702344675. The cubic root of 161053111 is about 544.0719959049.

The spelling of 161053111 in words is "one hundred sixty-one million, fifty-three thousand, one hundred eleven".