450221647 has 2 divisors, whose sum is σ = 450221648. Its totient is φ = 450221646.

The previous prime is 450221641. The next prime is 450221669. The reversal of 450221647 is 746122054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 450221647 - 2¹¹ = 450219599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450221641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225110823 + 225110824.

It is an arithmetic number, because the mean of its divisors is an integer number (225110824).

Almost surely, 2^450221647 is an apocalyptic number.

450221647 is a deficient number, since it is larger than the sum of its proper divisors (1).

450221647 is an equidigital number, since it uses as much as digits as its factorization.

450221647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 450221647 is about 21218.4270623437. The cubic root of 450221647 is about 766.4352266957.

The spelling of 450221647 in words is "four hundred fifty million, two hundred twenty-one thousand, six hundred forty-seven".