131431477 has 4 divisors (see below), whose sum is σ = 131916736. Its totient is φ = 130946220.

The previous prime is 131431459. The next prime is 131431481. The reversal of 131431477 is 774134131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131431477 - 2²³ = 123042869 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 (131431877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242223 + ... + 242764.

It is an arithmetic number, because the mean of its divisors is an integer number (32979184).

Almost surely, 2^131431477 is an apocalyptic number.

It is an amenable number.

131431477 is a deficient number, since it is larger than the sum of its proper divisors (485259).

131431477 is an equidigital number, since it uses as much as digits as its factorization.

131431477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485258.

The product of its digits is 7056, while the sum is 31.

The square root of 131431477 is about 11464.3568070782. The cubic root of 131431477 is about 508.4322960123.

The spelling of 131431477 in words is "one hundred thirty-one million, four hundred thirty-one thousand, four hundred seventy-seven".