221054125 has 8 divisors (see below), whose sum is σ = 275875704. Its totient is φ = 176843200.

The previous prime is 221054123. The next prime is 221054131. The reversal of 221054125 is 521450122.

It can be written as a sum of positive squares in 4 ways, for example, as 56169 + 220997956 = 237^2 + 14866^2 .

It is not a de Polignac number, because 221054125 - 2¹ = 221054123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221054096 and 221054105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221054123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 884092 + ... + 884341.

It is an arithmetic number, because the mean of its divisors is an integer number (34484463).

Almost surely, 2^221054125 is an apocalyptic number.

221054125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221054125 is a deficient number, since it is larger than the sum of its proper divisors (54821579).

221054125 is an equidigital number, since it uses as much as digits as its factorization.

221054125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768448 (or 1768438 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 221054125 is about 14867.8890566213. The cubic root of 221054125 is about 604.6437125404.

The spelling of 221054125 in words is "two hundred twenty-one million, fifty-four thousand, one hundred twenty-five".