131445031 has 4 divisors (see below), whose sum is σ = 132024312. Its totient is φ = 130865752.

The previous prime is 131445029. The next prime is 131445043. The reversal of 131445031 is 130544131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130544131 = 31 ⋅4211101.

It is a cyclic number.

It is not a de Polignac number, because 131445031 - 2¹ = 131445029 is a prime.

It is a super-2 number, since 2×131445031² = 34555592349181922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131444993 and 131445011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131445011) 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, 289300 + ... + 289753.

It is an arithmetic number, because the mean of its divisors is an integer number (33006078).

Almost surely, 2^131445031 is an apocalyptic number.

131445031 is a deficient number, since it is larger than the sum of its proper divisors (579281).

131445031 is an equidigital number, since it uses as much as digits as its factorization.

131445031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579280.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131445031 is about 11464.9479283597. The cubic root of 131445031 is about 508.4497729379.

Adding to 131445031 its reverse (130544131), we get a palindrome (261989162).

The spelling of 131445031 in words is "one hundred thirty-one million, four hundred forty-five thousand, thirty-one".