161222622 has 16 divisors (see below), whose sum is σ = 351758592. Its totient is φ = 48855320.

The previous prime is 161222591. The next prime is 161222627. The reversal of 161222622 is 226222161.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 161222592 and 161222601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161222627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221318 + ... + 1221449.

It is an arithmetic number, because the mean of its divisors is an integer number (21984912).

Almost surely, 2^161222622 is an apocalyptic number.

161222622 is an abundant number, since it is smaller than the sum of its proper divisors (190535970).

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

161222622 is a wasteful number, since it uses less digits than its factorization.

161222622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442783.

The product of its digits is 1152, while the sum is 24.

The square root of 161222622 is about 12697.3470457415. The cubic root of 161222622 is about 544.2628104958.

Adding to 161222622 its reverse (226222161), we get a palindrome (387444783).

The spelling of 161222622 in words is "one hundred sixty-one million, two hundred twenty-two thousand, six hundred twenty-two".