221040325 has 24 divisors (see below), whose sum is σ = 301409280. Its totient is φ = 159465600.

The previous prime is 221040301. The next prime is 221040353. The reversal of 221040325 is 523040122.

It is not a de Polignac number, because 221040325 - 2¹⁷ = 220909253 is a prime.

It is a super-2 number, since 2×221040325² = 97717650552211250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31761 + ... + 38089.

It is an arithmetic number, because the mean of its divisors is an integer number (12558720).

Almost surely, 2^221040325 is an apocalyptic number.

221040325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221040325 is a deficient number, since it is larger than the sum of its proper divisors (80368955).

221040325 is a wasteful number, since it uses less digits than its factorization.

221040325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477 (or 6472 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 221040325 is about 14867.4249619764. The cubic root of 221040325 is about 604.6311300158.

Adding to 221040325 its reverse (523040122), we get a palindrome (744080447).

The spelling of 221040325 in words is "two hundred twenty-one million, forty thousand, three hundred twenty-five".