2153301221 has 4 divisors (see below), whose sum is σ = 2182798572. Its totient is φ = 2123803872.

The previous prime is 2153301203. The next prime is 2153301253. The reversal of 2153301221 is 1221033512.

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 1644302500 + 508998721 = 40550^2 + 22561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153301221 is a prime.

It is a super-2 number, since 2×2153301221² = 9273412296720181682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2153301193 and 2153301202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153300221) 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, 14748566 + ... + 14748711.

It is an arithmetic number, because the mean of its divisors is an integer number (545699643).

Almost surely, 2^2153301221 is an apocalyptic number.

It is an amenable number.

2153301221 is a deficient number, since it is larger than the sum of its proper divisors (29497351).

2153301221 is an equidigital number, since it uses as much as digits as its factorization.

2153301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29497350.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2153301221 is about 46403.6768047533. The cubic root of 2153301221 is about 1291.3231263379.

Adding to 2153301221 its reverse (1221033512), we get a palindrome (3374334733).

The spelling of 2153301221 in words is "two billion, one hundred fifty-three million, three hundred one thousand, two hundred twenty-one".