223220261 has 16 divisors (see below), whose sum is σ = 247123968. Its totient is φ = 199940400.

The previous prime is 223220213. The next prime is 223220281. The reversal of 223220261 is 162022322.

It is a de Polignac number, because none of the positive numbers 2^k-223220261 is a prime.

It is a super-3 number, since 3×223220261³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223220281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306680 + ... + 307406.

It is an arithmetic number, because the mean of its divisors is an integer number (15445248).

Almost surely, 2^223220261 is an apocalyptic number.

It is an amenable number.

223220261 is a deficient number, since it is larger than the sum of its proper divisors (23903707).

223220261 is a wasteful number, since it uses less digits than its factorization.

223220261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 223220261 is about 14940.5575866498. The cubic root of 223220261 is about 606.6122885621.

Adding to 223220261 its reverse (162022322), we get a palindrome (385242583).

The spelling of 223220261 in words is "two hundred twenty-three million, two hundred twenty thousand, two hundred sixty-one".