531213365 has 16 divisors (see below), whose sum is σ = 696729600. Its totient is φ = 387068160.

The previous prime is 531213337. The next prime is 531213367. The reversal of 531213365 is 563312135.

It is a de Polignac number, because none of the positive numbers 2^k-531213365 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531213367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98165 + ... + 103434.

It is an arithmetic number, because the mean of its divisors is an integer number (43545600).

Almost surely, 2^531213365 is an apocalyptic number.

It is an amenable number.

531213365 is a deficient number, since it is larger than the sum of its proper divisors (165516235).

531213365 is a wasteful number, since it uses less digits than its factorization.

531213365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201652.

The product of its digits is 8100, while the sum is 29.

The square root of 531213365 is about 23048.0664047985. The cubic root of 531213365 is about 809.8843329223.

The spelling of 531213365 in words is "five hundred thirty-one million, two hundred thirteen thousand, three hundred sixty-five".