231040623 has 16 divisors (see below), whose sum is σ = 336352896. Its totient is φ = 139902240.

The previous prime is 231040597. The next prime is 231040633. The reversal of 231040623 is 326040132.

It is a happy number.

It is not a de Polignac number, because 231040623 - 2¹⁸ = 230778479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231040623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231040633) 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, 47961 + ... + 52557.

It is an arithmetic number, because the mean of its divisors is an integer number (21022056).

Almost surely, 2^231040623 is an apocalyptic number.

231040623 is a deficient number, since it is larger than the sum of its proper divisors (105312273).

231040623 is a wasteful number, since it uses less digits than its factorization.

231040623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231040623 is about 15200.0204934072. The cubic root of 231040623 is about 613.6152092889.

Adding to 231040623 its reverse (326040132), we get a palindrome (557080755).

The spelling of 231040623 in words is "two hundred thirty-one million, forty thousand, six hundred twenty-three".