221456933 has 2 divisors, whose sum is σ = 221456934. Its totient is φ = 221456932.

The previous prime is 221456929. The next prime is 221456971. The reversal of 221456933 is 339654122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187607809 + 33849124 = 13697^2 + 5818^2 .

It is a cyclic number.

It is not a de Polignac number, because 221456933 - 2² = 221456929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221456893 and 221456902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221456993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110728466 + 110728467.

It is an arithmetic number, because the mean of its divisors is an integer number (110728467).

Almost surely, 2^221456933 is an apocalyptic number.

It is an amenable number.

221456933 is a deficient number, since it is larger than the sum of its proper divisors (1).

221456933 is an equidigital number, since it uses as much as digits as its factorization.

221456933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 221456933 is about 14881.4291316392. The cubic root of 221456933 is about 605.0107531727.

The spelling of 221456933 in words is "two hundred twenty-one million, four hundred fifty-six thousand, nine hundred thirty-three".