221834070085 has 4 divisors (see below), whose sum is σ = 266200884108. Its totient is φ = 177467256064.

The previous prime is 221834070083. The next prime is 221834070103. The reversal of 221834070085 is 580070438122.

It is a happy number.

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 106515418689 + 115318651396 = 326367^2 + 339586^2 .

It is a cyclic number.

It is not a de Polignac number, because 221834070085 - 2¹ = 221834070083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221834070083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22183407004 + ... + 22183407013.

It is an arithmetic number, because the mean of its divisors is an integer number (66550221027).

Almost surely, 2^221834070085 is an apocalyptic number.

It is an amenable number.

221834070085 is a deficient number, since it is larger than the sum of its proper divisors (44366814023).

221834070085 is an equidigital number, since it uses as much as digits as its factorization.

221834070085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44366814022.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 221834070085 in words is "two hundred twenty-one billion, eight hundred thirty-four million, seventy thousand, eighty-five".