222143985 has 64 divisors (see below), whose sum is σ = 465960960. Its totient is φ = 98262720.

The previous prime is 222143983. The next prime is 222144001. The reversal of 222143985 is 589341222.

It is a happy number.

It is not a de Polignac number, because 222143985 - 2¹ = 222143983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222143983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25504 + ... + 33086.

It is an arithmetic number, because the mean of its divisors is an integer number (7280640).

Almost surely, 2^222143985 is an apocalyptic number.

It is an amenable number.

222143985 is an abundant number, since it is smaller than the sum of its proper divisors (243816975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222143985 is a wasteful number, since it uses less digits than its factorization.

222143985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635 (or 7629 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 222143985 is about 14904.4954627790. The cubic root of 222143985 is about 605.6357726999.

The spelling of 222143985 in words is "two hundred twenty-two million, one hundred forty-three thousand, nine hundred eighty-five".