494553221 has 2 divisors, whose sum is σ = 494553222. Its totient is φ = 494553220.

The previous prime is 494553217. The next prime is 494553271. The reversal of 494553221 is 122355494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400560196 + 93993025 = 20014^2 + 9695^2 .

It is a cyclic number.

It is not a de Polignac number, because 494553221 - 2² = 494553217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494553271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247276610 + 247276611.

It is an arithmetic number, because the mean of its divisors is an integer number (247276611).

Almost surely, 2^494553221 is an apocalyptic number.

It is an amenable number.

494553221 is a deficient number, since it is larger than the sum of its proper divisors (1).

494553221 is an equidigital number, since it uses as much as digits as its factorization.

494553221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 494553221 is about 22238.5525832955. The cubic root of 494553221 is about 790.8079225986.

The spelling of 494553221 in words is "four hundred ninety-four million, five hundred fifty-three thousand, two hundred twenty-one".