222411661 has 4 divisors (see below), whose sum is σ = 227143872. Its totient is φ = 217679452.

The previous prime is 222411647. The next prime is 222411677. The reversal of 222411661 is 166114222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222411661 - 2²⁷ = 88193933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222411601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366035 + ... + 2366128.

It is an arithmetic number, because the mean of its divisors is an integer number (56785968).

Almost surely, 2^222411661 is an apocalyptic number.

It is an amenable number.

222411661 is a deficient number, since it is larger than the sum of its proper divisors (4732211).

222411661 is an equidigital number, since it uses as much as digits as its factorization.

222411661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732210.

The product of its digits is 1152, while the sum is 25.

The square root of 222411661 is about 14913.4724661965. The cubic root of 222411661 is about 605.8789319443.

Adding to 222411661 its reverse (166114222), we get a palindrome (388525883).

The spelling of 222411661 in words is "two hundred twenty-two million, four hundred eleven thousand, six hundred sixty-one".