221321159 has 2 divisors, whose sum is σ = 221321160. Its totient is φ = 221321158.

The previous prime is 221321131. The next prime is 221321209. The reversal of 221321159 is 951123122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221321159 - 2¹⁶ = 221255623 is a prime.

It is a super-2 number, since 2×221321159² = 97966110842206562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221321119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660579 + 110660580.

It is an arithmetic number, because the mean of its divisors is an integer number (110660580).

Almost surely, 2^221321159 is an apocalyptic number.

221321159 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321159 is an equidigital number, since it uses as much as digits as its factorization.

221321159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 221321159 is about 14876.8665719633. The cubic root of 221321159 is about 604.8870849993.

The spelling of 221321159 in words is "two hundred twenty-one million, three hundred twenty-one thousand, one hundred fifty-nine".