131440207 has 8 divisors (see below), whose sum is σ = 135470720. Its totient is φ = 127454040.

The previous prime is 131440187. The next prime is 131440213. The reversal of 131440207 is 702044131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131440207 - 2⁷ = 131440079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5019 + ... + 16972.

It is an arithmetic number, because the mean of its divisors is an integer number (16933840).

Almost surely, 2^131440207 is an apocalyptic number.

131440207 is a deficient number, since it is larger than the sum of its proper divisors (4030513).

131440207 is a wasteful number, since it uses less digits than its factorization.

131440207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22173.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 131440207 is about 11464.7375460583. The cubic root of 131440207 is about 508.4435528684.

Adding to 131440207 its reverse (702044131), we get a palindrome (833484338).

The spelling of 131440207 in words is "one hundred thirty-one million, four hundred forty thousand, two hundred seven".