221300461 has 2 divisors, whose sum is σ = 221300462. Its totient is φ = 221300460.

The previous prime is 221300381. The next prime is 221300483. The reversal of 221300461 is 164003122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220077225 + 1223236 = 14835^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221300461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221300491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110650230 + 110650231.

It is an arithmetic number, because the mean of its divisors is an integer number (110650231).

Almost surely, 2^221300461 is an apocalyptic number.

It is an amenable number.

221300461 is a deficient number, since it is larger than the sum of its proper divisors (1).

221300461 is an equidigital number, since it uses as much as digits as its factorization.

221300461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 221300461 is about 14876.1709118980. The cubic root of 221300461 is about 604.8682280235.

Adding to 221300461 its reverse (164003122), we get a palindrome (385303583).

The spelling of 221300461 in words is "two hundred twenty-one million, three hundred thousand, four hundred sixty-one".