221925 has 24 divisors (see below), whose sum is σ = 401760. Its totient is φ = 107200.

The previous prime is 221909. The next prime is 221941. The reversal of 221925 is 529122.

It is an interprime number because it is at equal distance from previous prime (221909) and next prime (221941).

It is not a de Polignac number, because 221925 - 2⁴ = 221909 is a prime.

It is a Curzon number.

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, 691 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2²²¹⁹²⁵ is an apocalyptic number.

221925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221925 is a deficient number, since it is larger than the sum of its proper divisors (179835).

221925 is a wasteful number, since it uses less digits than its factorization.

221925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 288 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 221925 is about 471.0891635349. The cubic root of 221925 is about 60.5436699483.

The spelling of 221925 in words is "two hundred twenty-one thousand, nine hundred twenty-five".