450231521 has 2 divisors, whose sum is σ = 450231522. Its totient is φ = 450231520.

The previous prime is 450231473. The next prime is 450231533. The reversal of 450231521 is 125132054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401441296 + 48790225 = 20036^2 + 6985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450231521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (450231571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225115760 + 225115761.

It is an arithmetic number, because the mean of its divisors is an integer number (225115761).

Almost surely, 2^450231521 is an apocalyptic number.

It is an amenable number.

450231521 is a deficient number, since it is larger than the sum of its proper divisors (1).

450231521 is an equidigital number, since it uses as much as digits as its factorization.

450231521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 450231521 is about 21218.6597361850. The cubic root of 450231521 is about 766.4408296590.

Adding to 450231521 its reverse (125132054), we get a palindrome (575363575).

The spelling of 450231521 in words is "four hundred fifty million, two hundred thirty-one thousand, five hundred twenty-one".