159264221 has 2 divisors, whose sum is σ = 159264222. Its totient is φ = 159264220.

The previous prime is 159264139. The next prime is 159264227. The reversal of 159264221 is 122462951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 40780996 = 10885^2 + 6386^2 .

It is a cyclic number.

It is not a de Polignac number, because 159264221 - 2²² = 155069917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159264227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79632110 + 79632111.

It is an arithmetic number, because the mean of its divisors is an integer number (79632111).

Almost surely, 2^159264221 is an apocalyptic number.

It is an amenable number.

159264221 is a deficient number, since it is larger than the sum of its proper divisors (1).

159264221 is an equidigital number, since it uses as much as digits as its factorization.

159264221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 159264221 is about 12619.9929080804. The cubic root of 159264221 is about 542.0500729872.

The spelling of 159264221 in words is "one hundred fifty-nine million, two hundred sixty-four thousand, two hundred twenty-one".