231206406 has 16 divisors (see below), whose sum is σ = 465789744. Its totient is φ = 76505984.

The previous prime is 231206389. The next prime is 231206407. The reversal of 231206406 is 604602132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231206407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139815 + ... + 141458.

It is an arithmetic number, because the mean of its divisors is an integer number (29111859).

Almost surely, 2^231206406 is an apocalyptic number.

231206406 is an abundant number, since it is smaller than the sum of its proper divisors (234583338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231206406 is a wasteful number, since it uses less digits than its factorization.

231206406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281415.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 231206406 is about 15205.4728962963. The cubic root of 231206406 is about 613.7619405538.

Adding to 231206406 its reverse (604602132), we get a palindrome (835808538).

The spelling of 231206406 in words is "two hundred thirty-one million, two hundred six thousand, four hundred six".