231011423 has 2 divisors, whose sum is σ = 231011424. Its totient is φ = 231011422.

The previous prime is 231011413. The next prime is 231011441. The reversal of 231011423 is 324110132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231011423 - 2¹² = 231007327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231011413) 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, 115505711 + 115505712.

It is an arithmetic number, because the mean of its divisors is an integer number (115505712).

Almost surely, 2^231011423 is an apocalyptic number.

231011423 is a deficient number, since it is larger than the sum of its proper divisors (1).

231011423 is an equidigital number, since it uses as much as digits as its factorization.

231011423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231011423 is about 15199.0599380356. The cubic root of 231011423 is about 613.5893576750.

Adding to 231011423 its reverse (324110132), we get a palindrome (555121555).

The spelling of 231011423 in words is "two hundred thirty-one million, eleven thousand, four hundred twenty-three".