223261661 has 16 divisors (see below), whose sum is σ = 258249600. Its totient is φ = 189062208.

The previous prime is 223261651. The next prime is 223261673. The reversal of 223261661 is 166162322.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223261661 is a prime.

It is a super-3 number, since 3×223261661³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223261601) 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, 261311 + ... + 262163.

It is an arithmetic number, because the mean of its divisors is an integer number (16140600).

Almost surely, 2^223261661 is an apocalyptic number.

It is an amenable number.

223261661 is a deficient number, since it is larger than the sum of its proper divisors (34987939).

223261661 is a wasteful number, since it uses less digits than its factorization.

223261661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268.

The product of its digits is 5184, while the sum is 29.

The square root of 223261661 is about 14941.9430128749. The cubic root of 223261661 is about 606.6497884381.

The spelling of 223261661 in words is "two hundred twenty-three million, two hundred sixty-one thousand, six hundred sixty-one".