450631165 has 4 divisors (see below), whose sum is σ = 540757404. Its totient is φ = 360504928.

The previous prime is 450631163. The next prime is 450631171. The reversal of 450631165 is 561136054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561136054 = 2 ⋅280568027.

It can be written as a sum of positive squares in 2 ways, for example, as 274830084 + 175801081 = 16578^2 + 13259^2 .

It is a cyclic number.

It is not a de Polignac number, because 450631165 - 2¹ = 450631163 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450631163) 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, 45063112 + ... + 45063121.

It is an arithmetic number, because the mean of its divisors is an integer number (135189351).

Almost surely, 2^450631165 is an apocalyptic number.

It is an amenable number.

450631165 is a deficient number, since it is larger than the sum of its proper divisors (90126239).

450631165 is an equidigital number, since it uses as much as digits as its factorization.

450631165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90126238.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 450631165 is about 21228.0749244956. The cubic root of 450631165 is about 766.6675373861.

The spelling of 450631165 in words is "four hundred fifty million, six hundred thirty-one thousand, one hundred sixty-five".