15530340223 has 4 divisors (see below), whose sum is σ = 15564323920. Its totient is φ = 15496356528.

The previous prime is 15530340197. The next prime is 15530340233. The reversal of 15530340223 is 32204303551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32204303551 = 7 ⋅4600614793.

It is a cyclic number.

It is not a de Polignac number, because 15530340223 - 2²⁵ = 15496785791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15530340191 and 15530340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15530340233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16991163 + ... + 16992076.

It is an arithmetic number, because the mean of its divisors is an integer number (3891080980).

Almost surely, 2^15530340223 is an apocalyptic number.

15530340223 is a deficient number, since it is larger than the sum of its proper divisors (33983697).

15530340223 is an equidigital number, since it uses as much as digits as its factorization.

15530340223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33983696.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 15530340223 its reverse (32204303551), we get a palindrome (47734643774).

The spelling of 15530340223 in words is "fifteen billion, five hundred thirty million, three hundred forty thousand, two hundred twenty-three".