531201505 has 4 divisors (see below), whose sum is σ = 637441812. Its totient is φ = 424961200.

The previous prime is 531201479. The next prime is 531201511. The reversal of 531201505 is 505102135.

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 133079296 + 398122209 = 11536^2 + 19953^2 .

It is not a de Polignac number, because 531201505 - 2¹¹ = 531199457 is a prime.

It is a Smith number, since the sum of its digits (22) 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53120146 + ... + 53120155.

It is an arithmetic number, because the mean of its divisors is an integer number (159360453).

Almost surely, 2^531201505 is an apocalyptic number.

It is an amenable number.

531201505 is a deficient number, since it is larger than the sum of its proper divisors (106240307).

531201505 is a wasteful number, since it uses less digits than its factorization.

531201505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106240306.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 531201505 is about 23047.8091149680. The cubic root of 531201505 is about 809.8783056519.

The spelling of 531201505 in words is "five hundred thirty-one million, two hundred one thousand, five hundred five".