161648223 has 32 divisors (see below), whose sum is σ = 254783232. Its totient is φ = 90048000.

The previous prime is 161648213. The next prime is 161648237. The reversal of 161648223 is 322846161.

It is not a de Polignac number, because 161648223 - 2¹⁴ = 161631839 is a prime.

It is a super-2 number, since 2×161648223² = 52260295998115458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161648203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20773 + ... + 27473.

It is an arithmetic number, because the mean of its divisors is an integer number (7961976).

Almost surely, 2^161648223 is an apocalyptic number.

161648223 is a deficient number, since it is larger than the sum of its proper divisors (93135009).

161648223 is a wasteful number, since it uses less digits than its factorization.

161648223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775.

The product of its digits is 13824, while the sum is 33.

The square root of 161648223 is about 12714.0954456068. The cubic root of 161648223 is about 544.7413108919.

The spelling of 161648223 in words is "one hundred sixty-one million, six hundred forty-eight thousand, two hundred twenty-three".