221454313 has 4 divisors (see below), whose sum is σ = 221743060. Its totient is φ = 221165568.

The previous prime is 221454307. The next prime is 221454397. The reversal of 221454313 is 313454122.

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 40094224 + 181360089 = 6332^2 + 13467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221454313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221454113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143220 + ... + 144757.

It is an arithmetic number, because the mean of its divisors is an integer number (55435765).

Almost surely, 2^221454313 is an apocalyptic number.

It is an amenable number.

221454313 is a deficient number, since it is larger than the sum of its proper divisors (288747).

221454313 is an equidigital number, since it uses as much as digits as its factorization.

221454313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288746.

The product of its digits is 2880, while the sum is 25.

The square root of 221454313 is about 14881.3411021991. The cubic root of 221454313 is about 605.0083672544.

The spelling of 221454313 in words is "two hundred twenty-one million, four hundred fifty-four thousand, three hundred thirteen".