222646405 has 16 divisors (see below), whose sum is σ = 270993600. Its totient is φ = 175584640.

The previous prime is 222646381. The next prime is 222646409. The reversal of 222646405 is 504646222.

It is not a de Polignac number, because 222646405 - 2⁹ = 222645893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222646409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217986 + ... + 219004.

It is an arithmetic number, because the mean of its divisors is an integer number (16937100).

Almost surely, 2^222646405 is an apocalyptic number.

It is an amenable number.

222646405 is a deficient number, since it is larger than the sum of its proper divisors (48347195).

222646405 is a wasteful number, since it uses less digits than its factorization.

222646405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 222646405 is about 14921.3405899068. The cubic root of 222646405 is about 606.0920149501.

The spelling of 222646405 in words is "two hundred twenty-two million, six hundred forty-six thousand, four hundred five".