450022021 has 2 divisors, whose sum is σ = 450022022. Its totient is φ = 450022020.

The previous prime is 450021941. The next prime is 450022037. The reversal of 450022021 is 120220054.

It is an a-pointer prime, because the next prime (450022037) can be obtained adding 450022021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237591396 + 212430625 = 15414^2 + 14575^2 .

It is a cyclic number.

It is not a de Polignac number, because 450022021 - 2²⁵ = 416467589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 450021986 and 450022004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450022051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225011010 + 225011011.

It is an arithmetic number, because the mean of its divisors is an integer number (225011011).

Almost surely, 2^450022021 is an apocalyptic number.

It is an amenable number.

450022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

450022021 is an equidigital number, since it uses as much as digits as its factorization.

450022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 450022021 is about 21213.7224691943. The cubic root of 450022021 is about 766.3219321156.

Adding to 450022021 its reverse (120220054), we get a palindrome (570242075).

The spelling of 450022021 in words is "four hundred fifty million, twenty-two thousand, twenty-one".