231161326 has 16 divisors (see below), whose sum is σ = 382012848. Its totient is φ = 104032000.

The previous prime is 231161317. The next prime is 231161341. The reversal of 231161326 is 623161132.

It is a self number, because there is not a number n which added to its sum of digits gives 231161326.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49795 + ... + 54238.

It is an arithmetic number, because the mean of its divisors is an integer number (23875803).

Almost surely, 2^231161326 is an apocalyptic number.

231161326 is a deficient number, since it is larger than the sum of its proper divisors (150851522).

231161326 is a wasteful number, since it uses less digits than its factorization.

231161326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104147.

The product of its digits is 1296, while the sum is 25.

The square root of 231161326 is about 15203.9904630331. The cubic root of 231161326 is about 613.7220480797.

It can be divided in two parts, 23116 and 1326, that added together give a palindrome (24442).

The spelling of 231161326 in words is "two hundred thirty-one million, one hundred sixty-one thousand, three hundred twenty-six".