159720223 has 4 divisors (see below), whose sum is σ = 172006408. Its totient is φ = 147434040.

The previous prime is 159720221. The next prime is 159720229. The reversal of 159720223 is 322027951.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 159720223 - 2¹ = 159720221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159720221) 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 in 3 ways as a sum of consecutive naturals, for example, 6143073 + ... + 6143098.

It is an arithmetic number, because the mean of its divisors is an integer number (43001602).

Almost surely, 2^159720223 is an apocalyptic number.

159720223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

159720223 is a deficient number, since it is larger than the sum of its proper divisors (12286185).

159720223 is a wasteful number, since it uses less digits than its factorization.

159720223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12286184.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 159720223 is about 12638.0466449527. The cubic root of 159720223 is about 542.5669088619.

The spelling of 159720223 in words is "one hundred fifty-nine million, seven hundred twenty thousand, two hundred twenty-three".