15478444213 has 2 divisors, whose sum is σ = 15478444214. Its totient is φ = 15478444212.

The previous prime is 15478444169. The next prime is 15478444229. The reversal of 15478444213 is 31244487451.

15478444213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14668358769 + 810085444 = 121113^2 + 28462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15478444213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15478444213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15478444313) 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, 7739222106 + 7739222107.

It is an arithmetic number, because the mean of its divisors is an integer number (7739222107).

Almost surely, 2^15478444213 is an apocalyptic number.

It is an amenable number.

15478444213 is a deficient number, since it is larger than the sum of its proper divisors (1).

15478444213 is an equidigital number, since it uses as much as digits as its factorization.

15478444213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430080, while the sum is 43.

The spelling of 15478444213 in words is "fifteen billion, four hundred seventy-eight million, four hundred forty-four thousand, two hundred thirteen".