231236426 has 4 divisors (see below), whose sum is σ = 346854642. Its totient is φ = 115618212.

The previous prime is 231236419. The next prime is 231236449. The reversal of 231236426 is 624632132.

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

It can be written as a sum of positive squares in only one way, i.e., 176491225 + 54745201 = 13285^2 + 7399^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57809105 + ... + 57809108.

Almost surely, 2^231236426 is an apocalyptic number.

231236426 is a deficient number, since it is larger than the sum of its proper divisors (115618216).

231236426 is a wasteful number, since it uses less digits than its factorization.

231236426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115618215.

The product of its digits is 10368, while the sum is 29.

The square root of 231236426 is about 15206.4600088252. The cubic root of 231236426 is about 613.7885031628.

Adding to 231236426 its reverse (624632132), we get a palindrome (855868558).

The spelling of 231236426 in words is "two hundred thirty-one million, two hundred thirty-six thousand, four hundred twenty-six".