131442233 has 4 divisors (see below), whose sum is σ = 141553188. Its totient is φ = 121331280.

The previous prime is 131442197. The next prime is 131442253. The reversal of 131442233 is 332244131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88303609 + 43138624 = 9397^2 + 6568^2 .

It is a cyclic number.

It is not a de Polignac number, because 131442233 - 2⁶ = 131442169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131442199 and 131442208.

It is not an unprimeable number, because it can be changed into a prime (131442253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055458 + ... + 5055483.

It is an arithmetic number, because the mean of its divisors is an integer number (35388297).

Almost surely, 2^131442233 is an apocalyptic number.

131442233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131442233 is a deficient number, since it is larger than the sum of its proper divisors (10110955).

131442233 is a wasteful number, since it uses less digits than its factorization.

131442233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110954.

The product of its digits is 1728, while the sum is 23.

The square root of 131442233 is about 11464.8259036062. The cubic root of 131442233 is about 508.4461652130.

Adding to 131442233 its reverse (332244131), we get a palindrome (463686364).

The spelling of 131442233 in words is "one hundred thirty-one million, four hundred forty-two thousand, two hundred thirty-three".