231435009 has 32 divisors (see below), whose sum is σ = 371226240. Its totient is φ = 141656256.

The previous prime is 231434981. The next prime is 231435019. The reversal of 231435009 is 900534132.

231435009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231435009 - 2⁷ = 231434881 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231435019) 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, 67474 + ... + 70820.

It is an arithmetic number, because the mean of its divisors is an integer number (11600820).

Almost surely, 2^231435009 is an apocalyptic number.

It is an amenable number.

231435009 is a deficient number, since it is larger than the sum of its proper divisors (139791231).

231435009 is a wasteful number, since it uses less digits than its factorization.

231435009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3560 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 231435009 is about 15212.9881680096. The cubic root of 231435009 is about 613.9641575628.

The spelling of 231435009 in words is "two hundred thirty-one million, four hundred thirty-five thousand, nine".