221054065 has 4 divisors (see below), whose sum is σ = 265264884. Its totient is φ = 176843248.

The previous prime is 221054011. The next prime is 221054069. The reversal of 221054065 is 560450122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123676641 + 97377424 = 11121^2 + 9868^2 .

It is a cyclic number.

It is not a de Polignac number, because 221054065 - 2¹⁷ = 220922993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221054069) 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, 22105402 + ... + 22105411.

It is an arithmetic number, because the mean of its divisors is an integer number (66316221).

Almost surely, 2^221054065 is an apocalyptic number.

It is an amenable number.

221054065 is a deficient number, since it is larger than the sum of its proper divisors (44210819).

221054065 is an equidigital number, since it uses as much as digits as its factorization.

221054065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44210818.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 221054065 is about 14867.8870388499. The cubic root of 221054065 is about 604.6436578349.

The spelling of 221054065 in words is "two hundred twenty-one million, fifty-four thousand, sixty-five".