221353061 has 2 divisors, whose sum is σ = 221353062. Its totient is φ = 221353060.

The previous prime is 221353043. The next prime is 221353103. The reversal of 221353061 is 160353122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131217025 + 90136036 = 11455^2 + 9494^2 .

It is a cyclic number.

It is not a de Polignac number, because 221353061 - 2⁶ = 221352997 is a prime.

It is a super-2 number, since 2×221353061² = 97994355228139442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221353661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110676530 + 110676531.

It is an arithmetic number, because the mean of its divisors is an integer number (110676531).

Almost surely, 2^221353061 is an apocalyptic number.

It is an amenable number.

221353061 is a deficient number, since it is larger than the sum of its proper divisors (1).

221353061 is an equidigital number, since it uses as much as digits as its factorization.

221353061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 221353061 is about 14877.9387349189. The cubic root of 221353061 is about 604.9161471109.

The spelling of 221353061 in words is "two hundred twenty-one million, three hundred fifty-three thousand, sixty-one".