222543997 has 8 divisors (see below), whose sum is σ = 239833944. Its totient is φ = 205278528.

The previous prime is 222543983. The next prime is 222544037. The reversal of 222543997 is 799345222.

222543997 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 78039556 + 144504441 = 8834^2 + 12021^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-222543997 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 (222543907) 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, 15663 + ... + 26275.

It is an arithmetic number, because the mean of its divisors is an integer number (29979243).

Almost surely, 2^222543997 is an apocalyptic number.

It is an amenable number.

222543997 is a deficient number, since it is larger than the sum of its proper divisors (17289947).

222543997 is a wasteful number, since it uses less digits than its factorization.

222543997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239.

The product of its digits is 272160, while the sum is 43.

The square root of 222543997 is about 14917.9086000686. The cubic root of 222543997 is about 605.9990750711. Note that the first 3 decimals are identical.

The spelling of 222543997 in words is "two hundred twenty-two million, five hundred forty-three thousand, nine hundred ninety-seven".