221750273 has 4 divisors (see below), whose sum is σ = 233421360. Its totient is φ = 210079188.

The previous prime is 221750257. The next prime is 221750279. The reversal of 221750273 is 372057122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 372057122 = 2 ⋅186028561.

It is a cyclic number.

It is not a de Polignac number, because 221750273 - 2⁴ = 221750257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221750279) 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, 5835515 + ... + 5835552.

It is an arithmetic number, because the mean of its divisors is an integer number (58355340).

Almost surely, 2^221750273 is an apocalyptic number.

It is an amenable number.

221750273 is a deficient number, since it is larger than the sum of its proper divisors (11671087).

221750273 is a wasteful number, since it uses less digits than its factorization.

221750273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671086.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 221750273 is about 14891.2817782755. The cubic root of 221750273 is about 605.2777660398.

The spelling of 221750273 in words is "two hundred twenty-one million, seven hundred fifty thousand, two hundred seventy-three".