223622661 has 16 divisors (see below), whose sum is σ = 305648640. Its totient is φ = 145351920.

The previous prime is 223622621. The next prime is 223622669. The reversal of 223622661 is 166226322.

It is not a de Polignac number, because 223622661 - 2¹⁰ = 223621637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223622669) 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, 91546 + ... + 93956.

It is an arithmetic number, because the mean of its divisors is an integer number (19103040).

Almost surely, 2^223622661 is an apocalyptic number.

It is an amenable number.

223622661 is a deficient number, since it is larger than the sum of its proper divisors (82025979).

223622661 is a wasteful number, since it uses less digits than its factorization.

223622661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its digits is 10368, while the sum is 30.

The square root of 223622661 is about 14954.0182225380. The cubic root of 223622661 is about 606.9765838253.

Adding to 223622661 its reverse (166226322), we get a palindrome (389848983).

The spelling of 223622661 in words is "two hundred twenty-three million, six hundred twenty-two thousand, six hundred sixty-one".