131223365 has 16 divisors (see below), whose sum is σ = 193807488. Its totient is φ = 83059776.

The previous prime is 131223361. The next prime is 131223373. The reversal of 131223365 is 563322131.

It is a cyclic number.

It is not a de Polignac number, because 131223365 - 2² = 131223361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143747 + ... + 144656.

It is an arithmetic number, because the mean of its divisors is an integer number (12112968).

Almost surely, 2^131223365 is an apocalyptic number.

It is an amenable number.

131223365 is a deficient number, since it is larger than the sum of its proper divisors (62584123).

131223365 is a wasteful number, since it uses less digits than its factorization.

131223365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288428.

The product of its digits is 3240, while the sum is 26.

The square root of 131223365 is about 11455.2767317075. The cubic root of 131223365 is about 508.1637992983.

Adding to 131223365 its reverse (563322131), we get a palindrome (694545496).

The spelling of 131223365 in words is "one hundred thirty-one million, two hundred twenty-three thousand, three hundred sixty-five".