161162111 has 8 divisors (see below), whose sum is σ = 177199104. Its totient is φ = 145356120.

The previous prime is 161162101. The next prime is 161162147. The reversal of 161162111 is 111261161.

It is a happy number.

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 161162111 - 2¹⁴ = 161145727 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 (161162101) 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 7 ways as a sum of consecutive naturals, for example, 56285 + ... + 59078.

It is an arithmetic number, because the mean of its divisors is an integer number (22149888).

Almost surely, 2^161162111 is an apocalyptic number.

161162111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161162111 is a deficient number, since it is larger than the sum of its proper divisors (16036993).

161162111 is a wasteful number, since it uses less digits than its factorization.

161162111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115501.

The product of its digits is 72, while the sum is 20.

The square root of 161162111 is about 12694.9640015244. The cubic root of 161162111 is about 544.1947100277.

The spelling of 161162111 in words is "one hundred sixty-one million, one hundred sixty-two thousand, one hundred eleven".