2153221025 has 6 divisors (see below), whose sum is σ = 2669994102.
Its totient is φ = 1722576800.
The previous prime is 2153220959. The next prime is 2153221051. The reversal of 2153221025 is 5201223512.
Adding to 2153221025 its reverse (5201223512), we get a palindrome (7354444537).
It can be written as a sum of positive squares in 3 ways, for example, as 10549504 + 2142671521 = 3248^2 + 46289^2
It is not a de Polignac number, because 2153221025 - 218 = 2152958881 is a prime.
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43064396 + ... + 43064445.
It is an arithmetic number, because the mean of its divisors is an integer number (444999017).
Almost surely, 22153221025 is an apocalyptic number.
2153221025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
2153221025 is a deficient number, since it is larger than the sum of its proper divisors (516773077).
2153221025 is an equidigital number, since it uses as much as digits as its factorization.
2153221025 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 86128851 (or 86128846 counting only the distinct ones).
The product of its (nonzero) digits is 1200, while the sum is 23.
The square root of 2153221025 is about 46402.8126841466.
The cubic root of 2153221025 is about 1291.3070951027.
The spelling of 2153221025 in words is "two billion, one hundred fifty-three million, two hundred twenty-one thousand, twenty-five".