11243223009 has 32 divisors (see below), whose sum is σ = 17421384960. Its totient is φ = 7152862464.

The previous prime is 11243222983. The next prime is 11243223011. The reversal of 11243223009 is 90032234211.

It is a happy number.

11243223009 is a `hidden beast` number, since 11 + 24 + 322 + 300 + 9 = 666.

It is not a de Polignac number, because 11243223009 - 2²⁴ = 11226445793 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 (11243223109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247987 + ... + 289799.

It is an arithmetic number, because the mean of its divisors is an integer number (544418280).

Almost surely, 2^11243223009 is an apocalyptic number.

It is an amenable number.

11243223009 is a deficient number, since it is larger than the sum of its proper divisors (6178161951).

11243223009 is a wasteful number, since it uses less digits than its factorization.

11243223009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42278 (or 42272 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 11243223009 in words is "eleven billion, two hundred forty-three million, two hundred twenty-three thousand, nine".