222303521 has 16 divisors (see below), whose sum is σ = 248520960. Its totient is φ = 197147280.

The previous prime is 222303427. The next prime is 222303539. The reversal of 222303521 is 125303222.

It is a de Polignac number, because none of the positive numbers 2^k-222303521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222303493 and 222303502.

It is not an unprimeable number, because it can be changed into a prime (222300521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77450 + ... + 80268.

It is an arithmetic number, because the mean of its divisors is an integer number (15532560).

Almost surely, 2^222303521 is an apocalyptic number.

It is an amenable number.

222303521 is a deficient number, since it is larger than the sum of its proper divisors (26217439).

222303521 is a wasteful number, since it uses less digits than its factorization.

222303521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 222303521 is about 14909.8464445480. The cubic root of 222303521 is about 605.7807201132.

Adding to 222303521 its reverse (125303222), we get a palindrome (347606743).

The spelling of 222303521 in words is "two hundred twenty-two million, three hundred three thousand, five hundred twenty-one".