221130325 has 12 divisors (see below), whose sum is σ = 295294468. Its totient is φ = 163296000.

The previous prime is 221130319. The next prime is 221130337. The reversal of 221130325 is 523031122.

It can be written as a sum of positive squares in 6 ways, for example, as 7941124 + 213189201 = 2818^2 + 14601^2 .

It is not a de Polignac number, because 221130325 - 2²⁵ = 187575893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339876 + ... + 340525.

Almost surely, 2^221130325 is an apocalyptic number.

221130325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221130325 is a deficient number, since it is larger than the sum of its proper divisors (74164143).

221130325 is a wasteful number, since it uses less digits than its factorization.

221130325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680424 (or 680419 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 221130325 is about 14870.4514053878. The cubic root of 221130325 is about 604.7131805313.

Adding to 221130325 its reverse (523031122), we get a palindrome (744161447).

The spelling of 221130325 in words is "two hundred twenty-one million, one hundred thirty thousand, three hundred twenty-five".