159041621 has 2 divisors, whose sum is σ = 159041622. Its totient is φ = 159041620.

The previous prime is 159041599. The next prime is 159041629. The reversal of 159041621 is 126140951.

159041621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141943396 + 17098225 = 11914^2 + 4135^2 .

It is an emirp because it is prime and its reverse (126140951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159041621 - 2²² = 154847317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159041629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79520810 + 79520811.

It is an arithmetic number, because the mean of its divisors is an integer number (79520811).

Almost surely, 2^159041621 is an apocalyptic number.

It is an amenable number.

159041621 is a deficient number, since it is larger than the sum of its proper divisors (1).

159041621 is an equidigital number, since it uses as much as digits as its factorization.

159041621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 159041621 is about 12611.1704849312. The cubic root of 159041621 is about 541.7974181977.

The spelling of 159041621 in words is "one hundred fifty-nine million, forty-one thousand, six hundred twenty-one".