161324822 has 4 divisors (see below), whose sum is σ = 241987236. Its totient is φ = 80662410.

The previous prime is 161324803. The next prime is 161324827. The reversal of 161324822 is 228423161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228423161 = 59 ⋅3871579.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161324827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40331204 + ... + 40331207.

It is an arithmetic number, because the mean of its divisors is an integer number (60496809).

Almost surely, 2^161324822 is an apocalyptic number.

161324822 is a deficient number, since it is larger than the sum of its proper divisors (80662414).

161324822 is an equidigital number, since it uses as much as digits as its factorization.

161324822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80662413.

The product of its digits is 4608, while the sum is 29.

The square root of 161324822 is about 12701.3708708942. The cubic root of 161324822 is about 544.3777900384.

Adding to 161324822 its reverse (228423161), we get a palindrome (389747983).

The spelling of 161324822 in words is "one hundred sixty-one million, three hundred twenty-four thousand, eight hundred twenty-two".