450023081 has 4 divisors (see below), whose sum is σ = 450470100. Its totient is φ = 449576064.

The previous prime is 450023069. The next prime is 450023087. The reversal of 450023081 is 180320054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261921856 + 188101225 = 16184^2 + 13715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450023081 is a prime.

It is a super-2 number, since 2×450023081² = 405041546865465122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450023087) 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, 221996 + ... + 224013.

It is an arithmetic number, because the mean of its divisors is an integer number (112617525).

Almost surely, 2^450023081 is an apocalyptic number.

It is an amenable number.

450023081 is a deficient number, since it is larger than the sum of its proper divisors (447019).

450023081 is a wasteful number, since it uses less digits than its factorization.

450023081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447018.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 450023081 is about 21213.7474530079. The cubic root of 450023081 is about 766.3225337903.

The spelling of 450023081 in words is "four hundred fifty million, twenty-three thousand, eighty-one".