161328211 has 6 divisors (see below), whose sum is σ = 177327836. Its totient is φ = 146661900.

The previous prime is 161328199. The next prime is 161328239. The reversal of 161328211 is 112823161.

It is not a de Polignac number, because 161328211 - 2¹⁷ = 161197139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161328311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666525 + ... + 666766.

Almost surely, 2^161328211 is an apocalyptic number.

161328211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161328211 is a deficient number, since it is larger than the sum of its proper divisors (15999625).

161328211 is a wasteful number, since it uses less digits than its factorization.

161328211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333313 (or 1333302 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 161328211 is about 12701.5042809897. The cubic root of 161328211 is about 544.3816019820.

The spelling of 161328211 in words is "one hundred sixty-one million, three hundred twenty-eight thousand, two hundred eleven".