222555521 has 8 divisors (see below), whose sum is σ = 232552320. Its totient is φ = 212585472.

The previous prime is 222555491. The next prime is 222555523. The reversal of 222555521 is 125555222.

222555521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 222555521 - 2⁶ = 222555457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222555523) 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, 11396 + ... + 23978.

It is an arithmetic number, because the mean of its divisors is an integer number (29069040).

Almost surely, 2^222555521 is an apocalyptic number.

It is an amenable number.

222555521 is a deficient number, since it is larger than the sum of its proper divisors (9996799).

222555521 is a wasteful number, since it uses less digits than its factorization.

222555521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13375.

The product of its digits is 10000, while the sum is 29.

The square root of 222555521 is about 14918.2948422398. The cubic root of 222555521 is about 606.0095350444.

The spelling of 222555521 in words is "two hundred twenty-two million, five hundred fifty-five thousand, five hundred twenty-one".