15228645389 has 2 divisors, whose sum is σ = 15228645390. Its totient is φ = 15228645388.

The previous prime is 15228645323. The next prime is 15228645401. The reversal of 15228645389 is 98354682251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14590224100 + 638421289 = 120790^2 + 25267^2 .

It is a cyclic number.

It is not a de Polignac number, because 15228645389 - 2¹⁶ = 15228579853 is a prime.

It is a super-2 number, since 2×15228645389² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15228645389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15228645889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7614322694 + 7614322695.

It is an arithmetic number, because the mean of its divisors is an integer number (7614322695).

Almost surely, 2^15228645389 is an apocalyptic number.

It is an amenable number.

15228645389 is a deficient number, since it is larger than the sum of its proper divisors (1).

15228645389 is an equidigital number, since it uses as much as digits as its factorization.

15228645389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4147200, while the sum is 53.

The spelling of 15228645389 in words is "fifteen billion, two hundred twenty-eight million, six hundred forty-five thousand, three hundred eighty-nine".