450505213 has 4 divisors (see below), whose sum is σ = 450675808. Its totient is φ = 450334620.

The previous prime is 450505207. The next prime is 450505217. The reversal of 450505213 is 312505054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312505054 = 2 ⋅156252527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450505213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450505217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81273 + ... + 86638.

It is an arithmetic number, because the mean of its divisors is an integer number (112668952).

Almost surely, 2^450505213 is an apocalyptic number.

It is an amenable number.

450505213 is a deficient number, since it is larger than the sum of its proper divisors (170595).

450505213 is a wasteful number, since it uses less digits than its factorization.

450505213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170594.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 450505213 is about 21225.1080798191. The cubic root of 450505213 is about 766.5961025372.

The spelling of 450505213 in words is "four hundred fifty million, five hundred five thousand, two hundred thirteen".