131241233 has 2 divisors, whose sum is σ = 131241234. Its totient is φ = 131241232.

The previous prime is 131241221. The next prime is 131241239. The reversal of 131241233 is 332142131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94614529 + 36626704 = 9727^2 + 6052^2 .

It is an emirp because it is prime and its reverse (332142131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131241233 - 2¹⁰ = 131240209 is a prime.

It is a super-2 number, since 2×131241233² = 34448522478720578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131241239) by changing a digit.

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, 65620616 + 65620617.

It is an arithmetic number, because the mean of its divisors is an integer number (65620617).

Almost surely, 2^131241233 is an apocalyptic number.

It is an amenable number.

131241233 is a deficient number, since it is larger than the sum of its proper divisors (1).

131241233 is an equidigital number, since it uses as much as digits as its factorization.

131241233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 20.

The square root of 131241233 is about 11456.0566077512. The cubic root of 131241233 is about 508.1868629214.

Adding to 131241233 its reverse (332142131), we get a palindrome (463383364).

The spelling of 131241233 in words is "one hundred thirty-one million, two hundred forty-one thousand, two hundred thirty-three".