231442406 has 8 divisors (see below), whose sum is σ = 373868544. Its totient is φ = 106819560.

The previous prime is 231442349. The next prime is 231442411. The reversal of 231442406 is 604244132.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 8901631 = 231442406 / (2 + 3 + 1 + 4 + 4 + 2 + 4 + 0 + 6).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450790 + ... + 4450841.

It is an arithmetic number, because the mean of its divisors is an integer number (46733568).

Almost surely, 2^231442406 is an apocalyptic number.

231442406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

231442406 is a deficient number, since it is larger than the sum of its proper divisors (142426138).

231442406 is a wasteful number, since it uses less digits than its factorization.

231442406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901646.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 231442406 is about 15213.2312806977. The cubic root of 231442406 is about 613.9706985561.

Adding to 231442406 its reverse (604244132), we get a palindrome (835686538).

The spelling of 231442406 in words is "two hundred thirty-one million, four hundred forty-two thousand, four hundred six".