221807039 has 2 divisors, whose sum is σ = 221807040. Its totient is φ = 221807038.

The previous prime is 221807023. The next prime is 221807059. The reversal of 221807039 is 930708122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221807039 - 2⁴ = 221807023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221806996 and 221807014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221807059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110903519 + 110903520.

It is an arithmetic number, because the mean of its divisors is an integer number (110903520).

Almost surely, 2^221807039 is an apocalyptic number.

221807039 is a deficient number, since it is larger than the sum of its proper divisors (1).

221807039 is an equidigital number, since it uses as much as digits as its factorization.

221807039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 221807039 is about 14893.1876708783. The cubic root of 221807039 is about 605.3294101193.

The spelling of 221807039 in words is "two hundred twenty-one million, eight hundred seven thousand, thirty-nine".