221450071 has 2 divisors, whose sum is σ = 221450072. Its totient is φ = 221450070.

The previous prime is 221450063. The next prime is 221450083. The reversal of 221450071 is 170054122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221450071 - 2³ = 221450063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221450051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110725035 + 110725036.

It is an arithmetic number, because the mean of its divisors is an integer number (110725036).

Almost surely, 2^221450071 is an apocalyptic number.

221450071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221450071 is an equidigital number, since it uses as much as digits as its factorization.

221450071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 221450071 is about 14881.1985740397. The cubic root of 221450071 is about 605.0045042125.

The spelling of 221450071 in words is "two hundred twenty-one million, four hundred fifty thousand, seventy-one".