223450021 has 2 divisors, whose sum is σ = 223450022. Its totient is φ = 223450020.

The previous prime is 223450009. The next prime is 223450033. The reversal of 223450021 is 120054322.

223450021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (223450009) and next prime (223450033).

It can be written as a sum of positive squares in only one way, i.e., 220522500 + 2927521 = 14850^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 223450021 - 2¹⁵ = 223417253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223450061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111725010 + 111725011.

It is an arithmetic number, because the mean of its divisors is an integer number (111725011).

Almost surely, 2^223450021 is an apocalyptic number.

It is an amenable number.

223450021 is a deficient number, since it is larger than the sum of its proper divisors (1).

223450021 is an equidigital number, since it uses as much as digits as its factorization.

223450021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 223450021 is about 14948.2447464577. The cubic root of 223450021 is about 606.8203453138.

The spelling of 223450021 in words is "two hundred twenty-three million, four hundred fifty thousand, twenty-one".