221830125 has 32 divisors (see below), whose sum is σ = 402689664. Its totient is φ = 107552000.

The previous prime is 221830117. The next prime is 221830201. The reversal of 221830125 is 521038122.

It is not a de Polignac number, because 221830125 - 2³ = 221830117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221830095 and 221830104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22764 + ... + 31013.

It is an arithmetic number, because the mean of its divisors is an integer number (12584052).

Almost surely, 2^221830125 is an apocalyptic number.

221830125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221830125 is a deficient number, since it is larger than the sum of its proper divisors (180859539).

221830125 is a wasteful number, since it uses less digits than its factorization.

221830125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53806 (or 53796 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 221830125 is about 14893.9627030552. The cubic root of 221830125 is about 605.3504105799.

Adding to 221830125 its reverse (521038122), we get a palindrome (742868247).

The spelling of 221830125 in words is "two hundred twenty-one million, eight hundred thirty thousand, one hundred twenty-five".