159313381 has 4 divisors (see below), whose sum is σ = 159404812. Its totient is φ = 159221952.

The previous prime is 159313373. The next prime is 159313391. The reversal of 159313381 is 183313951.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120450625 + 38862756 = 10975^2 + 6234^2 .

It is a cyclic number.

It is not a de Polignac number, because 159313381 - 2³ = 159313373 is a prime.

It is a super-2 number, since 2×159313381² = 50761506731302322, 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 (159313351) 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 in 3 ways as a sum of consecutive naturals, for example, 43050 + ... + 46603.

It is an arithmetic number, because the mean of its divisors is an integer number (39851203).

Almost surely, 2^159313381 is an apocalyptic number.

It is an amenable number.

159313381 is a deficient number, since it is larger than the sum of its proper divisors (91431).

159313381 is an equidigital number, since it uses as much as digits as its factorization.

159313381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91430.

The product of its digits is 9720, while the sum is 34.

The square root of 159313381 is about 12621.9404609592. The cubic root of 159313381 is about 542.1058386830.

The spelling of 159313381 in words is "one hundred fifty-nine million, three hundred thirteen thousand, three hundred eighty-one".