231012499 has 2 divisors, whose sum is σ = 231012500. Its totient is φ = 231012498.

The previous prime is 231012493. The next prime is 231012503. The reversal of 231012499 is 994210132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231012499 - 2⁹ = 231011987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231012499.

It is not a weakly prime, because it can be changed into another prime (231012493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506249 + 115506250.

It is an arithmetic number, because the mean of its divisors is an integer number (115506250).

Almost surely, 2^231012499 is an apocalyptic number.

231012499 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012499 is an equidigital number, since it uses as much as digits as its factorization.

231012499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 231012499 is about 15199.0953349204. The cubic root of 231012499 is about 613.5903103279.

It can be divided in two parts, 23101 and 2499, that added together give a square (25600 = 160²).

The spelling of 231012499 in words is "two hundred thirty-one million, twelve thousand, four hundred ninety-nine".