2311135209 has 6 divisors (see below), whose sum is σ = 3338306426. Its totient is φ = 1540756800.

The previous prime is 2311135201. The next prime is 2311135213. The reversal of 2311135209 is 9025311132.

2311135209 is a `hidden beast` number, since 23 + 1 + 113 + 520 + 9 = 666.

2311135209 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1549209600 + 761925609 = 39360^2 + 27603^2 .

It is not a de Polignac number, because 2311135209 - 2³ = 2311135201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2311135201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128396392 + ... + 128396409.

Almost surely, 2^2311135209 is an apocalyptic number.

It is an amenable number.

2311135209 is a deficient number, since it is larger than the sum of its proper divisors (1027171217).

2311135209 is a wasteful number, since it uses less digits than its factorization.

2311135209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256792807 (or 256792804 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 2311135209 is about 48074.2676387275. The cubic root of 2311135209 is about 1322.1329170358.

The spelling of 2311135209 in words is "two billion, three hundred eleven million, one hundred thirty-five thousand, two hundred nine".