221250243 has 4 divisors (see below), whose sum is σ = 295000328. Its totient is φ = 147500160.

The previous prime is 221250241. The next prime is 221250277. The reversal of 221250243 is 342052122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221250243 - 2¹ = 221250241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221250241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36875038 + ... + 36875043.

It is an arithmetic number, because the mean of its divisors is an integer number (73750082).

Almost surely, 2^221250243 is an apocalyptic number.

221250243 is a deficient number, since it is larger than the sum of its proper divisors (73750085).

221250243 is an equidigital number, since it uses as much as digits as its factorization.

221250243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73750084.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 221250243 is about 14874.4829489969. The cubic root of 221250243 is about 604.8224718745.

The spelling of 221250243 in words is "two hundred twenty-one million, two hundred fifty thousand, two hundred forty-three".