222163649 has 4 divisors (see below), whose sum is σ = 222759636. Its totient is φ = 221567664.

The previous prime is 222163609. The next prime is 222163657. The reversal of 222163649 is 946361222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946361222 = 2 ⋅473180611.

It can be written as a sum of positive squares in 2 ways, for example, as 119749249 + 102414400 = 10943^2 + 10120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222163649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222163609) 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, 297434 + ... + 298179.

It is an arithmetic number, because the mean of its divisors is an integer number (55689909).

Almost surely, 2^222163649 is an apocalyptic number.

It is an amenable number.

222163649 is a deficient number, since it is larger than the sum of its proper divisors (595987).

222163649 is an equidigital number, since it uses as much as digits as its factorization.

222163649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595986.

The product of its digits is 31104, while the sum is 35.

The square root of 222163649 is about 14905.1551149258. The cubic root of 222163649 is about 605.6536422969.

The spelling of 222163649 in words is "two hundred twenty-two million, one hundred sixty-three thousand, six hundred forty-nine".