247221353 has 2 divisors, whose sum is σ = 247221354. Its totient is φ = 247221352.

The previous prime is 247221343. The next prime is 247221367. The reversal of 247221353 is 353122742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139310809 + 107910544 = 11803^2 + 10388^2 .

It is a cyclic number.

It is not a de Polignac number, because 247221353 - 2¹⁶ = 247155817 is a prime.

It is a super-2 number, since 2×247221353² = 122236794758301218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247221323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123610676 + 123610677.

It is an arithmetic number, because the mean of its divisors is an integer number (123610677).

Almost surely, 2^247221353 is an apocalyptic number.

It is an amenable number.

247221353 is a deficient number, since it is larger than the sum of its proper divisors (1).

247221353 is an equidigital number, since it uses as much as digits as its factorization.

247221353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 29.

The square root of 247221353 is about 15723.2742455253. The cubic root of 247221353 is about 627.6179070831.

The spelling of 247221353 in words is "two hundred forty-seven million, two hundred twenty-one thousand, three hundred fifty-three".