15530212549 has 2 divisors, whose sum is σ = 15530212550. Its totient is φ = 15530212548.

The previous prime is 15530212493. The next prime is 15530212553. The reversal of 15530212549 is 94521203551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15032476449 + 497736100 = 122607^2 + 22310^2 .

It is a cyclic number.

It is not a de Polignac number, because 15530212549 - 2¹³ = 15530204357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15530213549) 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, 7765106274 + 7765106275.

It is an arithmetic number, because the mean of its divisors is an integer number (7765106275).

Almost surely, 2^15530212549 is an apocalyptic number.

It is an amenable number.

15530212549 is a deficient number, since it is larger than the sum of its proper divisors (1).

15530212549 is an equidigital number, since it uses as much as digits as its factorization.

15530212549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 15530212549 in words is "fifteen billion, five hundred thirty million, two hundred twelve thousand, five hundred forty-nine".