161001222 has 8 divisors (see below), whose sum is σ = 322002456. Its totient is φ = 53667072.

The previous prime is 161001221. The next prime is 161001241. The reversal of 161001222 is 222100161.

161001222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

161001222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161001221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13416763 + ... + 13416774.

It is an arithmetic number, because the mean of its divisors is an integer number (40250307).

Almost surely, 2^161001222 is an apocalyptic number.

161001222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161001222 is a wasteful number, since it uses less digits than its factorization.

161001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26833542.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 161001222 is about 12688.6256939040. The cubic root of 161001222 is about 544.0135589001.

Adding to 161001222 its reverse (222100161), we get a palindrome (383101383).

The spelling of 161001222 in words is "one hundred sixty-one million, one thousand, two hundred twenty-two".