2015543440423 has 2 divisors, whose sum is σ = 2015543440424. Its totient is φ = 2015543440422.

The previous prime is 2015543440363. The next prime is 2015543440459. The reversal of 2015543440423 is 3240443455102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2015543440423 - 2⁹ = 2015543439911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015540440423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007771720211 + 1007771720212.

It is an arithmetic number, because the mean of its divisors is an integer number (1007771720212).

Almost surely, 2^{2015543440423} is an apocalyptic number.

2015543440423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015543440423 is an equidigital number, since it uses as much as digits as its factorization.

2015543440423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 2015543440423 its reverse (3240443455102), we get a palindrome (5255986895525).

The spelling of 2015543440423 in words is "two trillion, fifteen billion, five hundred forty-three million, four hundred forty thousand, four hundred twenty-three".