220240649 has 2 divisors, whose sum is σ = 220240650. Its totient is φ = 220240648.

The previous prime is 220240607. The next prime is 220240667. The reversal of 220240649 is 946042022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206439424 + 13801225 = 14368^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 220240649 - 2²⁰ = 219192073 is a prime.

It is not a weakly prime, because it can be changed into another prime (220240849) 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, 110120324 + 110120325.

It is an arithmetic number, because the mean of its divisors is an integer number (110120325).

Almost surely, 2^220240649 is an apocalyptic number.

It is an amenable number.

220240649 is a deficient number, since it is larger than the sum of its proper divisors (1).

220240649 is an equidigital number, since it uses as much as digits as its factorization.

220240649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 220240649 is about 14840.5070331172. The cubic root of 220240649 is about 603.9011074808.

The spelling of 220240649 in words is "two hundred twenty million, two hundred forty thousand, six hundred forty-nine".