222240578821 has 4 divisors (see below), whose sum is σ = 222297846444. Its totient is φ = 222183311200.

The previous prime is 222240578801. The next prime is 222240578897. The reversal of 222240578821 is 128875042222.

It is a happy number.

222240578821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61908406596 + 160332172225 = 248814^2 + 400415^2 .

It is a cyclic number.

It is not a de Polignac number, because 222240578821 - 2²⁷ = 222106361093 is a prime.

It is a super-3 number, since 3×222240578821³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222240578801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28627990 + ... + 28635751.

It is an arithmetic number, because the mean of its divisors is an integer number (55574461611).

Almost surely, 2^222240578821 is an apocalyptic number.

It is an amenable number.

222240578821 is a deficient number, since it is larger than the sum of its proper divisors (57267623).

222240578821 is an equidigital number, since it uses as much as digits as its factorization.

222240578821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57267622.

The product of its (nonzero) digits is 286720, while the sum is 43.

The spelling of 222240578821 in words is "two hundred twenty-two billion, two hundred forty million, five hundred seventy-eight thousand, eight hundred twenty-one".