221332249 has 2 divisors, whose sum is σ = 221332250. Its totient is φ = 221332248.

The previous prime is 221332213. The next prime is 221332283. The reversal of 221332249 is 942233122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212139225 + 9193024 = 14565^2 + 3032^2 .

It is a cyclic number.

It is not a de Polignac number, because 221332249 - 2¹¹ = 221330201 is a prime.

It is not a weakly prime, because it can be changed into another prime (221332649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666124 + 110666125.

It is an arithmetic number, because the mean of its divisors is an integer number (110666125).

Almost surely, 2^221332249 is an apocalyptic number.

It is an amenable number.

221332249 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332249 is an equidigital number, since it uses as much as digits as its factorization.

221332249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 221332249 is about 14877.2392936324. The cubic root of 221332249 is about 604.8971880937.

The spelling of 221332249 in words is "two hundred twenty-one million, three hundred thirty-two thousand, two hundred forty-nine".