250501221 has 16 divisors (see below), whose sum is σ = 375587520. Its totient is φ = 164987280.

The previous prime is 250501219. The next prime is 250501243. The reversal of 250501221 is 122105052.

It is not a de Polignac number, because 250501221 - 2¹ = 250501219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 250501194 and 250501203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250501261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53650 + ... + 58131.

It is an arithmetic number, because the mean of its divisors is an integer number (23474220).

Almost surely, 2^250501221 is an apocalyptic number.

It is an amenable number.

250501221 is a deficient number, since it is larger than the sum of its proper divisors (125086299).

250501221 is a wasteful number, since it uses less digits than its factorization.

250501221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111873 (or 111867 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 250501221 is about 15827.2303641541. The cubic root of 250501221 is about 630.3812431679.

Adding to 250501221 its reverse (122105052), we get a palindrome (372606273).

The spelling of 250501221 in words is "two hundred fifty million, five hundred one thousand, two hundred twenty-one".