231011503 has 2 divisors, whose sum is σ = 231011504. Its totient is φ = 231011502.

The previous prime is 231011497. The next prime is 231011509. The reversal of 231011503 is 305110132.

It is a balanced prime because it is at equal distance from previous prime (231011497) and next prime (231011509).

It is a cyclic number.

It is not a de Polignac number, because 231011503 - 2⁹ = 231010991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231011509) 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 as a sum of consecutive naturals, namely, 115505751 + 115505752.

It is an arithmetic number, because the mean of its divisors is an integer number (115505752).

Almost surely, 2^231011503 is an apocalyptic number.

231011503 is a deficient number, since it is larger than the sum of its proper divisors (1).

231011503 is an equidigital number, since it uses as much as digits as its factorization.

231011503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 231011503 is about 15199.0625697771. The cubic root of 231011503 is about 613.5894285043.

Adding to 231011503 its reverse (305110132), we get a palindrome (536121635).

The spelling of 231011503 in words is "two hundred thirty-one million, eleven thousand, five hundred three".