531231011 has 8 divisors (see below), whose sum is σ = 567642240. Its totient is φ = 495393408.

The previous prime is 531230983. The next prime is 531231037. The reversal of 531231011 is 110132135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531231011 - 2¹⁴ = 531214627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (531231091) 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 7 ways as a sum of consecutive naturals, for example, 141491 + ... + 145196.

It is an arithmetic number, because the mean of its divisors is an integer number (70955280).

Almost surely, 2^531231011 is an apocalyptic number.

531231011 is a deficient number, since it is larger than the sum of its proper divisors (36411229).

531231011 is a wasteful number, since it uses less digits than its factorization.

531231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286813.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 531231011 is about 23048.4492103048. The cubic root of 531231011 is about 809.8933004807.

Adding to 531231011 its reverse (110132135), we get a palindrome (641363146).

The spelling of 531231011 in words is "five hundred thirty-one million, two hundred thirty-one thousand, eleven".