2240143209 has 20 divisors (see below), whose sum is σ = 3409532676. Its totient is φ = 1465248096.

The previous prime is 2240143201. The next prime is 2240143219. The reversal of 2240143209 is 9023410422.

2240143209 is a `hidden beast` number, since 224 + 0 + 1 + 432 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2031485184 + 208658025 = 45072^2 + 14445^2 .

It is not a de Polignac number, because 2240143209 - 2³ = 2240143201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2240143201) 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 in 19 ways as a sum of consecutive naturals, for example, 256614 + ... + 265199.

Almost surely, 2^2240143209 is an apocalyptic number.

It is an amenable number.

2240143209 is a deficient number, since it is larger than the sum of its proper divisors (1169389467).

2240143209 is an equidigital number, since it uses as much as digits as its factorization.

2240143209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521878 (or 521869 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2240143209 is about 47330.1511618123. The cubic root of 2240143209 is about 1308.4544071798.

The spelling of 2240143209 in words is "two billion, two hundred forty million, one hundred forty-three thousand, two hundred nine".