231612426 has 16 divisors (see below), whose sum is σ = 514694400. Its totient is φ = 77204124.

The previous prime is 231612419. The next prime is 231612463. The reversal of 231612426 is 624216132.

231612426 is a `hidden beast` number, since 2 + 3 + 1 + 612 + 42 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 231612426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144506 + ... + 2144613.

It is an arithmetic number, because the mean of its divisors is an integer number (32168400).

Almost surely, 2^231612426 is an apocalyptic number.

231612426 is an abundant number, since it is smaller than the sum of its proper divisors (283081974).

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

231612426 is a wasteful number, since it uses less digits than its factorization.

231612426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289130 (or 4289124 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 231612426 is about 15218.8181538515. The cubic root of 231612426 is about 614.1210048447.

Adding to 231612426 its reverse (624216132), we get a palindrome (855828558).

The spelling of 231612426 in words is "two hundred thirty-one million, six hundred twelve thousand, four hundred twenty-six".