223021400209 has 2 divisors, whose sum is σ = 223021400210. Its totient is φ = 223021400208.

The previous prime is 223021400201. The next prime is 223021400257. The reversal of 223021400209 is 902004120322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211924884609 + 11096515600 = 460353^2 + 105340^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021400209 - 2³ = 223021400201 is a prime.

It is not a weakly prime, because it can be changed into another prime (223021400201) 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 as a sum of consecutive naturals, namely, 111510700104 + 111510700105.

It is an arithmetic number, because the mean of its divisors is an integer number (111510700105).

Almost surely, 2^223021400209 is an apocalyptic number.

It is an amenable number.

223021400209 is a deficient number, since it is larger than the sum of its proper divisors (1).

223021400209 is an equidigital number, since it uses as much as digits as its factorization.

223021400209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 223021400209 in words is "two hundred twenty-three billion, twenty-one million, four hundred thousand, two hundred nine".