161222022300 has 72 divisors (see below), whose sum is σ = 468837086256. Its totient is φ = 42774287360.

The previous prime is 161222022263. The next prime is 161222022317. The reversal of 161222022300 is 3220222161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1304877 + ... + 1423076.

It is an arithmetic number, because the mean of its divisors is an integer number (6511626198).

Almost surely, 2^161222022300 is an apocalyptic number.

161222022300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161222022300 is an abundant number, since it is smaller than the sum of its proper divisors (307615063956).

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

161222022300 is a wasteful number, since it uses less digits than its factorization.

161222022300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728167 (or 2728160 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 161222022300 its reverse (3220222161), we get a palindrome (164442244461).

The spelling of 161222022300 in words is "one hundred sixty-one billion, two hundred twenty-two million, twenty-two thousand, three hundred".