131200431 has 4 divisors (see below), whose sum is σ = 174933912. Its totient is φ = 87466952.

The previous prime is 131200429. The next prime is 131200469. The reversal of 131200431 is 134002131.

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

It is a cyclic number.

It is not a de Polignac number, because 131200431 - 2¹ = 131200429 is a prime.

It is a super-2 number, since 2×131200431² = 34427106189171522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131200431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131200411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21866736 + ... + 21866741.

It is an arithmetic number, because the mean of its divisors is an integer number (43733478).

Almost surely, 2^131200431 is an apocalyptic number.

131200431 is a deficient number, since it is larger than the sum of its proper divisors (43733481).

131200431 is an equidigital number, since it uses as much as digits as its factorization.

131200431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43733480.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131200431 is about 11454.2756645717. The cubic root of 131200431 is about 508.1341935250.

Adding to 131200431 its reverse (134002131), we get a palindrome (265202562).

The spelling of 131200431 in words is "one hundred thirty-one million, two hundred thousand, four hundred thirty-one".