231102009 has 12 divisors (see below), whose sum is σ = 334007856. Its totient is φ = 153978552.

The previous prime is 231101989. The next prime is 231102017. The reversal of 231102009 is 900201132.

It is a happy number.

It is not a de Polignac number, because 231102009 - 2⁸ = 231101753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231101982 and 231102000.

It is not an unprimeable number, because it can be changed into a prime (231102409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11422 + ... + 24344.

It is an arithmetic number, because the mean of its divisors is an integer number (27833988).

Almost surely, 2^231102009 is an apocalyptic number.

It is an amenable number.

231102009 is a deficient number, since it is larger than the sum of its proper divisors (102905847).

231102009 is a wasteful number, since it uses less digits than its factorization.

231102009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14916 (or 14913 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 231102009 is about 15202.0396328914. The cubic root of 231102009 is about 613.6695490082.

The spelling of 231102009 in words is "two hundred thirty-one million, one hundred two thousand, nine".