231543406 has 8 divisors (see below), whose sum is σ = 347540904. Its totient is φ = 115696440.

The previous prime is 231543343. The next prime is 231543407. The reversal of 231543406 is 604345132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×231543406² = 107224697724161672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231543407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33705 + ... + 39988.

It is an arithmetic number, because the mean of its divisors is an integer number (43442613).

Almost surely, 2^231543406 is an apocalyptic number.

231543406 is a deficient number, since it is larger than the sum of its proper divisors (115997498).

231543406 is a wasteful number, since it uses less digits than its factorization.

231543406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75266.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 231543406 is about 15216.5503975113. The cubic root of 231543406 is about 614.0599965423.

Adding to 231543406 its reverse (604345132), we get a palindrome (835888538).

The spelling of 231543406 in words is "two hundred thirty-one million, five hundred forty-three thousand, four hundred six".