231140006 has 4 divisors (see below), whose sum is σ = 346710012. Its totient is φ = 115570002.

The previous prime is 231139957. The next prime is 231140023. The reversal of 231140006 is 600041132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57785000 + ... + 57785003.

It is an arithmetic number, because the mean of its divisors is an integer number (86677503).

Almost surely, 2^231140006 is an apocalyptic number.

231140006 is a deficient number, since it is larger than the sum of its proper divisors (115570006).

231140006 is a wasteful number, since it uses less digits than its factorization.

231140006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115570005.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231140006 is about 15203.2893151449. The cubic root of 231140006 is about 613.7031796462.

Adding to 231140006 its reverse (600041132), we get a palindrome (831181138).

The spelling of 231140006 in words is "two hundred thirty-one million, one hundred forty thousand, six".