450520571531 has 4 divisors (see below), whose sum is σ = 462696803232. Its totient is φ = 438344339832.

The previous prime is 450520571401. The next prime is 450520571537. The reversal of 450520571531 is 135175025054.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450520571531 is a prime.

It is a super-2 number, since 2×450520571531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450520571537) 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, 6088115795 + ... + 6088115868.

It is an arithmetic number, because the mean of its divisors is an integer number (115674200808).

Almost surely, 2^450520571531 is an apocalyptic number.

450520571531 is a deficient number, since it is larger than the sum of its proper divisors (12176231701).

450520571531 is a wasteful number, since it uses less digits than its factorization.

450520571531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12176231700.

The product of its (nonzero) digits is 105000, while the sum is 38.

Adding to 450520571531 its reverse (135175025054), we get a palindrome (585695596585).

The spelling of 450520571531 in words is "four hundred fifty billion, five hundred twenty million, five hundred seventy-one thousand, five hundred thirty-one".