221250125 has 8 divisors (see below), whose sum is σ = 276120312. Its totient is φ = 177000000.

The previous prime is 221250101. The next prime is 221250137. The reversal of 221250125 is 521052122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20376196 + 200873929 = 4514^2 + 14173^2 .

It is not a de Polignac number, because 221250125 - 2¹⁴ = 221233741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221250097 and 221250106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884876 + ... + 885125.

It is an arithmetic number, because the mean of its divisors is an integer number (34515039).

Almost surely, 2^221250125 is an apocalyptic number.

221250125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221250125 is a deficient number, since it is larger than the sum of its proper divisors (54870187).

221250125 is an equidigital number, since it uses as much as digits as its factorization.

221250125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770016 (or 1770006 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221250125 is about 14874.4789824720. The cubic root of 221250125 is about 604.8223643506.

The spelling of 221250125 in words is "two hundred twenty-one million, two hundred fifty thousand, one hundred twenty-five".