221425793 has 2 divisors, whose sum is σ = 221425794. Its totient is φ = 221425792.

The previous prime is 221425747. The next prime is 221425847. The reversal of 221425793 is 397524122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203718529 + 17707264 = 14273^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 221425793 - 2¹⁰ = 221424769 is a prime.

It is not a weakly prime, because it can be changed into another prime (221425093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110712896 + 110712897.

It is an arithmetic number, because the mean of its divisors is an integer number (110712897).

Almost surely, 2^221425793 is an apocalyptic number.

It is an amenable number.

221425793 is a deficient number, since it is larger than the sum of its proper divisors (1).

221425793 is an equidigital number, since it uses as much as digits as its factorization.

221425793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 221425793 is about 14880.3828243765. The cubic root of 221425793 is about 604.9823941328.

The spelling of 221425793 in words is "two hundred twenty-one million, four hundred twenty-five thousand, seven hundred ninety-three".