161223342 has 64 divisors (see below), whose sum is σ = 391910400. Its totient is φ = 43163136.

The previous prime is 161223323. The next prime is 161223389. The reversal of 161223342 is 243322161.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 248863 + ... + 249509.

It is an arithmetic number, because the mean of its divisors is an integer number (6123600).

Almost surely, 2^161223342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161223342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195955200).

161223342 is an abundant number, since it is smaller than the sum of its proper divisors (230687058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161223342 is a wasteful number, since it uses less digits than its factorization.

161223342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025.

The product of its digits is 1728, while the sum is 24.

The square root of 161223342 is about 12697.3753980892. The cubic root of 161223342 is about 544.2636206977.

The spelling of 161223342 in words is "one hundred sixty-one million, two hundred twenty-three thousand, three hundred forty-two".