156221159 has 2 divisors, whose sum is σ = 156221160. Its totient is φ = 156221158.

The previous prime is 156221113. The next prime is 156221161. The reversal of 156221159 is 951122651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156221159 is a prime.

Together with 156221161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156221459) 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, 78110579 + 78110580.

It is an arithmetic number, because the mean of its divisors is an integer number (78110580).

Almost surely, 2^156221159 is an apocalyptic number.

156221159 is a deficient number, since it is larger than the sum of its proper divisors (1).

156221159 is an equidigital number, since it uses as much as digits as its factorization.

156221159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 156221159 is about 12498.8463067597. The cubic root of 156221159 is about 538.5755312416.

The spelling of 156221159 in words is "one hundred fifty-six million, two hundred twenty-one thousand, one hundred fifty-nine".