159315421 has 2 divisors, whose sum is σ = 159315422. Its totient is φ = 159315420.

The previous prime is 159315389. The next prime is 159315433. The reversal of 159315421 is 124513951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 38007225 = 11014^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 159315421 - 2⁵ = 159315389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159315521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79657710 + 79657711.

It is an arithmetic number, because the mean of its divisors is an integer number (79657711).

Almost surely, 2^159315421 is an apocalyptic number.

It is an amenable number.

159315421 is a deficient number, since it is larger than the sum of its proper divisors (1).

159315421 is an equidigital number, since it uses as much as digits as its factorization.

159315421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 159315421 is about 12622.0212723636. The cubic root of 159315421 is about 542.1081525527.

The spelling of 159315421 in words is "one hundred fifty-nine million, three hundred fifteen thousand, four hundred twenty-one".