159020191 has 16 divisors (see below), whose sum is σ = 180707328. Its totient is φ = 138650400.

The previous prime is 159020189. The next prime is 159020219. The reversal of 159020191 is 191020951.

It is a cyclic number.

It is not a de Polignac number, because 159020191 - 2¹ = 159020189 is a prime.

It is a super-2 number, since 2×159020191² = 50574842291352962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159020161) 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 in 15 ways as a sum of consecutive naturals, for example, 26146 + ... + 31648.

It is an arithmetic number, because the mean of its divisors is an integer number (11294208).

Almost surely, 2^159020191 is an apocalyptic number.

159020191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

159020191 is the 6741-st centered heptagonal number.

159020191 is a deficient number, since it is larger than the sum of its proper divisors (21687137).

159020191 is a wasteful number, since it uses less digits than its factorization.

159020191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 159020191 is about 12610.3208127311. The cubic root of 159020191 is about 541.7730823454.

The spelling of 159020191 in words is "one hundred fifty-nine million, twenty thousand, one hundred ninety-one".