222540085 has 4 divisors (see below), whose sum is σ = 267048108. Its totient is φ = 178032064.

The previous prime is 222540061. The next prime is 222540091. The reversal of 222540085 is 580045222.

222540085 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 175986756 + 46553329 = 13266^2 + 6823^2 .

It is a cyclic number.

It is not a de Polignac number, because 222540085 - 2⁷ = 222539957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22254004 + ... + 22254013.

It is an arithmetic number, because the mean of its divisors is an integer number (66762027).

Almost surely, 2^222540085 is an apocalyptic number.

It is an amenable number.

222540085 is a deficient number, since it is larger than the sum of its proper divisors (44508023).

222540085 is an equidigital number, since it uses as much as digits as its factorization.

222540085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44508022.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 222540085 is about 14917.7774819173. Note that the first 3 decimals coincide. The cubic root of 222540085 is about 605.9955241893.

The spelling of 222540085 in words is "two hundred twenty-two million, five hundred forty thousand, eighty-five".