223177821889 has 27 divisors (see below), whose sum is σ = 249416271363. Its totient is φ = 199548940800.

The previous prime is 223177821871. The next prime is 223177821917. The reversal of 223177821889 is 988128771322.

The square root of 223177821889 is 472417.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 201451061889 + 21726760000 = 448833^2 + 147400^2 .

It is not a de Polignac number, because 223177821889 - 2¹⁹ = 223177297601 is a prime.

It is a super-3 number, since 3×223177821889³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223177821809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 348171009 + ... + 348171649.

Almost surely, 2^223177821889 is an apocalyptic number.

223177821889 is the 472417-th square number.

223177821889 is the 236209-th centered octagonal number.

It is an amenable number.

223177821889 is a deficient number, since it is larger than the sum of its proper divisors (26238449474).

223177821889 is an frugal number, since it uses more digits than its factorization.

223177821889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 719 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 58.

The spelling of 223177821889 in words is "two hundred twenty-three billion, one hundred seventy-seven million, eight hundred twenty-one thousand, eight hundred eighty-nine".