231338140209 has 32 divisors (see below), whose sum is σ = 373920768000. Its totient is φ = 140189579280.

The previous prime is 231338140177. The next prime is 231338140211. The reversal of 231338140209 is 902041833132.

231338140209 is a `hidden beast` number, since 2 + 31 + 3 + 381 + 40 + 209 = 666.

It is not a de Polignac number, because 231338140209 - 2⁵ = 231338140177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231338140259) 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, 3051052 + ... + 3125954.

It is an arithmetic number, because the mean of its divisors is an integer number (11685024000).

Almost surely, 2^231338140209 is an apocalyptic number.

It is an amenable number.

231338140209 is a deficient number, since it is larger than the sum of its proper divisors (142582627791).

231338140209 is a wasteful number, since it uses less digits than its factorization.

231338140209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85322 (or 85316 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 231338140209 in words is "two hundred thirty-one billion, three hundred thirty-eight million, one hundred forty thousand, two hundred nine".