450521531 has 4 divisors (see below), whose sum is σ = 450727872. Its totient is φ = 450315192.

The previous prime is 450521497. The next prime is 450521557. The reversal of 450521531 is 135125054.

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

It is a cyclic number.

It is not a de Polignac number, because 450521531 - 2¹⁰ = 450520507 is a prime.

It is a super-2 number, since 2×450521531² = 405939299789167922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 450521531.

It is not an unprimeable number, because it can be changed into a prime (450521231) 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, 99860 + ... + 104273.

It is an arithmetic number, because the mean of its divisors is an integer number (112681968).

Almost surely, 2^450521531 is an apocalyptic number.

450521531 is a deficient number, since it is larger than the sum of its proper divisors (206341).

450521531 is a wasteful number, since it uses less digits than its factorization.

450521531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206340.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 450521531 is about 21225.4924795633. The cubic root of 450521531 is about 766.6053581934.

Adding to 450521531 its reverse (135125054), we get a palindrome (585646585).

The spelling of 450521531 in words is "four hundred fifty million, five hundred twenty-one thousand, five hundred thirty-one".