156530243 has 2 divisors, whose sum is σ = 156530244. Its totient is φ = 156530242.

The previous prime is 156530201. The next prime is 156530317. The reversal of 156530243 is 342035651.

It is a weak prime.

It is an emirp because it is prime and its reverse (342035651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156530243 is a prime.

It is not a weakly prime, because it can be changed into another prime (156530443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78265121 + 78265122.

It is an arithmetic number, because the mean of its divisors is an integer number (78265122).

Almost surely, 2^156530243 is an apocalyptic number.

156530243 is a deficient number, since it is larger than the sum of its proper divisors (1).

156530243 is an equidigital number, since it uses as much as digits as its factorization.

156530243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 156530243 is about 12511.2046981895. The cubic root of 156530243 is about 538.9304883149.

Adding to 156530243 its reverse (342035651), we get a palindrome (498565894).

The spelling of 156530243 in words is "one hundred fifty-six million, five hundred thirty thousand, two hundred forty-three".