531921849 has 16 divisors (see below), whose sum is σ = 716718912. Its totient is φ = 350880768.

The previous prime is 531921829. The next prime is 531921877. The reversal of 531921849 is 948129135.

It is not a de Polignac number, because 531921849 - 2⁹ = 531921337 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 531921849.

It is not an unprimeable number, because it can be changed into a prime (531921829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298449 + ... + 300225.

It is an arithmetic number, because the mean of its divisors is an integer number (44794932).

Almost surely, 2^531921849 is an apocalyptic number.

It is an amenable number.

531921849 is a deficient number, since it is larger than the sum of its proper divisors (184797063).

531921849 is a wasteful number, since it uses less digits than its factorization.

531921849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776.

The product of its digits is 77760, while the sum is 42.

The square root of 531921849 is about 23063.4309893389. The cubic root of 531921849 is about 810.2442229581.

The spelling of 531921849 in words is "five hundred thirty-one million, nine hundred twenty-one thousand, eight hundred forty-nine".