131442031 has 4 divisors (see below), whose sum is σ = 150219472. Its totient is φ = 112664592.

The previous prime is 131441983. The next prime is 131442041. The reversal of 131442031 is 130244131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130244131 = 97 ⋅1342723.

It is a cyclic number.

It is not a de Polignac number, because 131442031 - 2¹¹ = 131439983 is a prime.

It is a super-2 number, since 2×131442031² = 34554015026809922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131442041) 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, 9388710 + ... + 9388723.

It is an arithmetic number, because the mean of its divisors is an integer number (37554868).

Almost surely, 2^131442031 is an apocalyptic number.

131442031 is a deficient number, since it is larger than the sum of its proper divisors (18777441).

131442031 is an equidigital number, since it uses as much as digits as its factorization.

131442031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777440.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131442031 is about 11464.8170940491. The cubic root of 131442031 is about 508.4459047534.

Adding to 131442031 its reverse (130244131), we get a palindrome (261686162).

The spelling of 131442031 in words is "one hundred thirty-one million, four hundred forty-two thousand, thirty-one".