222565540 has 12 divisors (see below), whose sum is σ = 467387676. Its totient is φ = 89026208.

The previous prime is 222565531. The next prime is 222565559. The reversal of 222565540 is 45565222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 110502144 + 112063396 = 10512^2 + 10586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564119 + ... + 5564158.

It is an arithmetic number, because the mean of its divisors is an integer number (38948973).

Almost surely, 2^222565540 is an apocalyptic number.

222565540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222565540 is an abundant number, since it is smaller than the sum of its proper divisors (244822136).

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

222565540 is a wasteful number, since it uses less digits than its factorization.

222565540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128286 (or 11128284 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 222565540 is about 14918.6306342104. The cubic root of 222565540 is about 606.0186286830.

The spelling of 222565540 in words is "two hundred twenty-two million, five hundred sixty-five thousand, five hundred forty".