221683427653 has 2 divisors, whose sum is σ = 221683427654. Its totient is φ = 221683427652.

The previous prime is 221683427621. The next prime is 221683427663. The reversal of 221683427653 is 356724386122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203479481569 + 18203946084 = 451087^2 + 134922^2 .

It is a cyclic number.

It is not a de Polignac number, because 221683427653 - 2⁵ = 221683427621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221683427597 and 221683427606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221683427663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110841713826 + 110841713827.

It is an arithmetic number, because the mean of its divisors is an integer number (110841713827).

Almost surely, 2^221683427653 is an apocalyptic number.

It is an amenable number.

221683427653 is a deficient number, since it is larger than the sum of its proper divisors (1).

221683427653 is an equidigital number, since it uses as much as digits as its factorization.

221683427653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 49.

The spelling of 221683427653 in words is "two hundred twenty-one billion, six hundred eighty-three million, four hundred twenty-seven thousand, six hundred fifty-three".