222506285 has 8 divisors (see below), whose sum is σ = 282713976. Its totient is φ = 167534080.

The previous prime is 222506281. The next prime is 222506293. The reversal of 222506285 is 582605222.

222506285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24344356 + 198161929 = 4934^2 + 14077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222506285 - 2² = 222506281 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 (222506281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308776 + ... + 1308945.

It is an arithmetic number, because the mean of its divisors is an integer number (35339247).

Almost surely, 2^222506285 is an apocalyptic number.

It is an amenable number.

222506285 is a deficient number, since it is larger than the sum of its proper divisors (60207691).

222506285 is a wasteful number, since it uses less digits than its factorization.

222506285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617743.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 222506285 is about 14916.6445623672. The cubic root of 222506285 is about 605.9648425471.

The spelling of 222506285 in words is "two hundred twenty-two million, five hundred six thousand, two hundred eighty-five".