161233442 has 8 divisors (see below), whose sum is σ = 241904556. Its totient is φ = 80598592.

The previous prime is 161233439. The next prime is 161233447. The reversal of 161233442 is 244332161.

161233442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 135233641 + 25999801 = 11629^2 + 5099^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161233447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10478 + ... + 20790.

Almost surely, 2^161233442 is an apocalyptic number.

161233442 is a deficient number, since it is larger than the sum of its proper divisors (80671114).

161233442 is a wasteful number, since it uses less digits than its factorization.

161233442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18132.

The product of its digits is 3456, while the sum is 26.

The square root of 161233442 is about 12697.7731118492. The cubic root of 161233442 is about 544.2749857762.

The spelling of 161233442 in words is "one hundred sixty-one million, two hundred thirty-three thousand, four hundred forty-two".