220061509 has 2 divisors, whose sum is σ = 220061510. Its totient is φ = 220061508.

The previous prime is 220061507. The next prime is 220061519. The reversal of 220061509 is 905160022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166332609 + 53728900 = 12897^2 + 7330^2 .

It is a cyclic number.

It is not a de Polignac number, because 220061509 - 2¹ = 220061507 is a prime.

Together with 220061507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220061507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110030754 + 110030755.

It is an arithmetic number, because the mean of its divisors is an integer number (110030755).

Almost surely, 2^220061509 is an apocalyptic number.

It is an amenable number.

220061509 is a deficient number, since it is larger than the sum of its proper divisors (1).

220061509 is an equidigital number, since it uses as much as digits as its factorization.

220061509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 220061509 is about 14834.4702972503. The cubic root of 220061509 is about 603.7373287694.

The spelling of 220061509 in words is "two hundred twenty million, sixty-one thousand, five hundred nine".