131231100233 has 4 divisors (see below), whose sum is σ = 131355964368. Its totient is φ = 131106236100.

The previous prime is 131231100227. The next prime is 131231100239. The reversal of 131231100233 is 332001132131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131231100227) and next prime (131231100239).

It is a cyclic number.

It is not a de Polignac number, because 131231100233 - 2¹⁴ = 131231083849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131231100239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62430491 + ... + 62432592.

It is an arithmetic number, because the mean of its divisors is an integer number (32838991092).

Almost surely, 2^131231100233 is an apocalyptic number.

It is an amenable number.

131231100233 is a deficient number, since it is larger than the sum of its proper divisors (124864135).

131231100233 is a wasteful number, since it uses less digits than its factorization.

131231100233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124864134.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131231100233 its reverse (332001132131), we get a palindrome (463232232364).

The spelling of 131231100233 in words is "one hundred thirty-one billion, two hundred thirty-one million, one hundred thousand, two hundred thirty-three".