2061223509 has 16 divisors (see below), whose sum is σ = 2770440192. Its totient is φ = 1363110768.

The previous prime is 2061223501. The next prime is 2061223579. The reversal of 2061223509 is 9053221602.

It is not a de Polignac number, because 2061223509 - 2³ = 2061223501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061223501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271564 + ... + 279050.

It is an arithmetic number, because the mean of its divisors is an integer number (173152512).

Almost surely, 2^2061223509 is an apocalyptic number.

It is an amenable number.

2061223509 is a deficient number, since it is larger than the sum of its proper divisors (709216683).

2061223509 is a wasteful number, since it uses less digits than its factorization.

2061223509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2061223509 is about 45400.6994329383. The cubic root of 2061223509 is about 1272.6481847081.

The spelling of 2061223509 in words is "two billion, sixty-one million, two hundred twenty-three thousand, five hundred nine".