221450330436469 has 2 divisors, whose sum is σ = 221450330436470. Its totient is φ = 221450330436468.

The previous prime is 221450330436457. The next prime is 221450330436523. The reversal of 221450330436469 is 964634033054122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213055768744900 + 8394561691569 = 14596430^2 + 2897337^2 .

It is a cyclic number.

It is not a de Polignac number, because 221450330436469 - 2¹³ = 221450330428277 is a prime.

It is a super-2 number, since 2×221450330436469² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221450330406469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110725165218234 + 110725165218235.

It is an arithmetic number, because the mean of its divisors is an integer number (110725165218235).

Almost surely, 2^{221450330436469} is an apocalyptic number.

It is an amenable number.

221450330436469 is a deficient number, since it is larger than the sum of its proper divisors (1).

221450330436469 is an equidigital number, since it uses as much as digits as its factorization.

221450330436469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 52.

The spelling of 221450330436469 in words is "two hundred twenty-one trillion, four hundred fifty billion, three hundred thirty million, four hundred thirty-six thousand, four hundred sixty-nine".