221133151 has 2 divisors, whose sum is σ = 221133152. Its totient is φ = 221133150.

The previous prime is 221133139. The next prime is 221133169. The reversal of 221133151 is 151331122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221133151 - 2¹⁷ = 221002079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221133181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110566575 + 110566576.

It is an arithmetic number, because the mean of its divisors is an integer number (110566576).

Almost surely, 2^221133151 is an apocalyptic number.

221133151 is a deficient number, since it is larger than the sum of its proper divisors (1).

221133151 is an equidigital number, since it uses as much as digits as its factorization.

221133151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 221133151 is about 14870.5464257370. The cubic root of 221133151 is about 604.7157565569.

Adding to 221133151 its reverse (151331122), we get a palindrome (372464273).

The spelling of 221133151 in words is "two hundred twenty-one million, one hundred thirty-three thousand, one hundred fifty-one".