221346893 has 2 divisors, whose sum is σ = 221346894. Its totient is φ = 221346892.

The previous prime is 221346889. The next prime is 221346911. The reversal of 221346893 is 398643122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216737284 + 4609609 = 14722^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 221346893 - 2² = 221346889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221346833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110673446 + 110673447.

It is an arithmetic number, because the mean of its divisors is an integer number (110673447).

Almost surely, 2^221346893 is an apocalyptic number.

It is an amenable number.

221346893 is a deficient number, since it is larger than the sum of its proper divisors (1).

221346893 is an equidigital number, since it uses as much as digits as its factorization.

221346893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 221346893 is about 14877.7314466958. The cubic root of 221346893 is about 604.9105283986.

The spelling of 221346893 in words is "two hundred twenty-one million, three hundred forty-six thousand, eight hundred ninety-three".