15530423 has 2 divisors, whose sum is σ = 15530424. Its totient is φ = 15530422.

The previous prime is 15530369. The next prime is 15530447. The reversal of 15530423 is 32403551.

It is a strong prime.

It is an emirp because it is prime and its reverse (32403551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15530423 - 2¹² = 15526327 is a prime.

It is a super-3 number, since 3×15530423³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15530453) 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, 7765211 + 7765212.

It is an arithmetic number, because the mean of its divisors is an integer number (7765212).

Almost surely, 2^15530423 is an apocalyptic number.

15530423 is a deficient number, since it is larger than the sum of its proper divisors (1).

15530423 is an equidigital number, since it uses as much as digits as its factorization.

15530423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 15530423 is about 3940.8657678231. The cubic root of 15530423 is about 249.4945681767.

Adding to 15530423 its reverse (32403551), we get a palindrome (47933974).

The spelling of 15530423 in words is "fifteen million, five hundred thirty thousand, four hundred twenty-three".