15420456523 has 2 divisors, whose sum is σ = 15420456524. Its totient is φ = 15420456522.

The previous prime is 15420456517. The next prime is 15420456529. The reversal of 15420456523 is 32565402451.

It is a balanced prime because it is at equal distance from previous prime (15420456517) and next prime (15420456529).

It is an emirp because it is prime and its reverse (32565402451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15420456523 - 2⁹ = 15420456011 is a prime.

It is not a weakly prime, because it can be changed into another prime (15420456529) 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, 7710228261 + 7710228262.

It is an arithmetic number, because the mean of its divisors is an integer number (7710228262).

Almost surely, 2^15420456523 is an apocalyptic number.

15420456523 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420456523 is an equidigital number, since it uses as much as digits as its factorization.

15420456523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 15420456523 its reverse (32565402451), we get a palindrome (47985858974).

The spelling of 15420456523 in words is "fifteen billion, four hundred twenty million, four hundred fifty-six thousand, five hundred twenty-three".