853221601 has 4 divisors (see below), whose sum is σ = 853293204. Its totient is φ = 853150000.

The previous prime is 853221563. The next prime is 853221661. The reversal of 853221601 is 106122358.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 106122358 = 2 ⋅53061179.

It can be written as a sum of positive squares in 2 ways, for example, as 120978001 + 732243600 = 10999^2 + 27060^2 .

It is a cyclic number.

It is not a de Polignac number, because 853221601 - 2¹³ = 853213409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 853221601.

It is not an unprimeable number, because it can be changed into a prime (853221661) 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, 13150 + ... + 43351.

It is an arithmetic number, because the mean of its divisors is an integer number (213323301).

Almost surely, 2^853221601 is an apocalyptic number.

It is an amenable number.

853221601 is a deficient number, since it is larger than the sum of its proper divisors (71603).

853221601 is a wasteful number, since it uses less digits than its factorization.

853221601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71602.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 853221601 is about 29209.9572235223. The cubic root of 853221601 is about 948.4634814749.

Adding to 853221601 its reverse (106122358), we get a palindrome (959343959).

The spelling of 853221601 in words is "eight hundred fifty-three million, two hundred twenty-one thousand, six hundred one".