2240210309 has 4 divisors (see below), whose sum is σ = 2371987404. Its totient is φ = 2108433216.

The previous prime is 2240210293. The next prime is 2240210321. The reversal of 2240210309 is 9030120422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1812630625 + 427579684 = 42575^2 + 20678^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240210309 - 2⁴ = 2240210293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240210369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65888522 + ... + 65888555.

It is an arithmetic number, because the mean of its divisors is an integer number (592996851).

Almost surely, 2^2240210309 is an apocalyptic number.

It is an amenable number.

2240210309 is a deficient number, since it is larger than the sum of its proper divisors (131777095).

2240210309 is a wasteful number, since it uses less digits than its factorization.

2240210309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131777094.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2240210309 is about 47330.8600069764. The cubic root of 2240210309 is about 1308.4674712871.

The spelling of 2240210309 in words is "two billion, two hundred forty million, two hundred ten thousand, three hundred nine".