131722243 has 4 divisors (see below), whose sum is σ = 132953400. Its totient is φ = 130491088.

The previous prime is 131722237. The next prime is 131722259. The reversal of 131722243 is 342227131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342227131 = 79 ⋅4331989.

It is a cyclic number.

It is not a de Polignac number, because 131722243 - 2¹⁷ = 131591171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131722223) 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, 615418 + ... + 615631.

It is an arithmetic number, because the mean of its divisors is an integer number (33238350).

Almost surely, 2^131722243 is an apocalyptic number.

131722243 is a deficient number, since it is larger than the sum of its proper divisors (1231157).

131722243 is a wasteful number, since it uses less digits than its factorization.

131722243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231156.

The product of its digits is 2016, while the sum is 25.

The square root of 131722243 is about 11477.0311056475. The cubic root of 131722243 is about 508.8069549696.

Adding to 131722243 its reverse (342227131), we get a palindrome (473949374).

The spelling of 131722243 in words is "one hundred thirty-one million, seven hundred twenty-two thousand, two hundred forty-three".