222243540 has 24 divisors (see below), whose sum is σ = 622282080. Its totient is φ = 59264928.

The previous prime is 222243473. The next prime is 222243563. The reversal of 222243540 is 45342222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 222243540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851970 + ... + 1852089.

It is an arithmetic number, because the mean of its divisors is an integer number (25928420).

Almost surely, 2^222243540 is an apocalyptic number.

222243540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222243540 is an abundant number, since it is smaller than the sum of its proper divisors (400038540).

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

222243540 is a wasteful number, since it uses less digits than its factorization.

222243540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704071 (or 3704069 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 222243540 is about 14907.8348528551. The cubic root of 222243540 is about 605.7262321446.

Adding to 222243540 its reverse (45342222), we get a palindrome (267585762).

The spelling of 222243540 in words is "two hundred twenty-two million, two hundred forty-three thousand, five hundred forty".