223206997 has 8 divisors (see below), whose sum is σ = 248666040. Its totient is φ = 198932160.

The previous prime is 223206989. The next prime is 223207001. The reversal of 223206997 is 799602322.

It can be written as a sum of positive squares in 4 ways, for example, as 630436 + 222576561 = 794^2 + 14919^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 223206997 - 2³ = 223206989 is a prime.

It is a super-3 number, since 3×223206997³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223206947) 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 7 ways as a sum of consecutive naturals, for example, 295654 + ... + 296407.

It is an arithmetic number, because the mean of its divisors is an integer number (31083255).

Almost surely, 2^223206997 is an apocalyptic number.

It is an amenable number.

223206997 is a deficient number, since it is larger than the sum of its proper divisors (25459043).

223206997 is a wasteful number, since it uses less digits than its factorization.

223206997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592103.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 223206997 is about 14940.1136876531. The cubic root of 223206997 is about 606.6002731284.

The spelling of 223206997 in words is "two hundred twenty-three million, two hundred six thousand, nine hundred ninety-seven".