161567990222 has 8 divisors (see below), whose sum is σ = 242640846000. Its totient is φ = 80687708224.

The previous prime is 161567990201. The next prime is 161567990251. The reversal of 161567990222 is 222099765161.

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

It is a super-2 number, since 2×161567990222² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48141347 + ... + 48144702.

It is an arithmetic number, because the mean of its divisors is an integer number (30330105750).

Almost surely, 2^161567990222 is an apocalyptic number.

161567990222 is a deficient number, since it is larger than the sum of its proper divisors (81072855778).

161567990222 is an equidigital number, since it uses as much as digits as its factorization.

161567990222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96286890.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 161567990222 in words is "one hundred sixty-one billion, five hundred sixty-seven million, nine hundred ninety thousand, two hundred twenty-two".