221025253 has 4 divisors (see below), whose sum is σ = 221618188. Its totient is φ = 220432320.

The previous prime is 221025247. The next prime is 221025281. The reversal of 221025253 is 352520122.

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 158583649 + 62441604 = 12593^2 + 7902^2 .

It is a cyclic number.

It is not a de Polignac number, because 221025253 - 2⁵ = 221025221 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 (221025223) 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, 295908 + ... + 296653.

It is an arithmetic number, because the mean of its divisors is an integer number (55404547).

Almost surely, 2^221025253 is an apocalyptic number.

It is an amenable number.

221025253 is a deficient number, since it is larger than the sum of its proper divisors (592935).

221025253 is an equidigital number, since it uses as much as digits as its factorization.

221025253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592934.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 221025253 is about 14866.9180733601. The cubic root of 221025253 is about 604.6173871124.

Adding to 221025253 its reverse (352520122), we get a palindrome (573545375).

The spelling of 221025253 in words is "two hundred twenty-one million, twenty-five thousand, two hundred fifty-three".