221954325 has 12 divisors (see below), whose sum is σ = 366964608. Its totient is φ = 118375600.

The previous prime is 221954303. The next prime is 221954377. The reversal of 221954325 is 523459122.

It is not a de Polignac number, because 221954325 - 2¹³ = 221946133 is a prime.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 1479621 + ... + 1479770.

It is an arithmetic number, because the mean of its divisors is an integer number (30580384).

Almost surely, 2^221954325 is an apocalyptic number.

221954325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221954325 is a deficient number, since it is larger than the sum of its proper divisors (145010283).

221954325 is a wasteful number, since it uses less digits than its factorization.

221954325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959404 (or 2959399 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 221954325 is about 14898.1315942638. The cubic root of 221954325 is about 605.4633656226.

The spelling of 221954325 in words is "two hundred twenty-one million, nine hundred fifty-four thousand, three hundred twenty-five".