223491081 has 32 divisors (see below), whose sum is σ = 344171520. Its totient is φ = 127713600.

The previous prime is 223491071. The next prime is 223491119. The reversal of 223491081 is 180194322.

It is not a de Polignac number, because 223491081 - 2⁵ = 223491049 is a prime.

It is a super-2 number, since 2×223491081² = 99896526573097122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (223491001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38436 + ... + 43866.

It is an arithmetic number, because the mean of its divisors is an integer number (10755360).

Almost surely, 2^223491081 is an apocalyptic number.

It is an amenable number.

223491081 is a deficient number, since it is larger than the sum of its proper divisors (120680439).

223491081 is a wasteful number, since it uses less digits than its factorization.

223491081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 223491081 is about 14949.6180887674. The cubic root of 223491081 is about 606.8575117418.

The spelling of 223491081 in words is "two hundred twenty-three million, four hundred ninety-one thousand, eighty-one".