131503431 has 8 divisors (see below), whose sum is σ = 177807744. Its totient is φ = 86434040.

The previous prime is 131503409. The next prime is 131503447. The reversal of 131503431 is 134305131.

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 131503431 - 2⁹ = 131502919 is a prime.

It is a super-2 number, since 2×131503431² = 34586304729543522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131503398 and 131503407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131503481) 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, 308481 + ... + 308906.

It is an arithmetic number, because the mean of its divisors is an integer number (22225968).

Almost surely, 2^131503431 is an apocalyptic number.

131503431 is a deficient number, since it is larger than the sum of its proper divisors (46304313).

131503431 is an equidigital number, since it uses as much as digits as its factorization.

131503431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617461.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131503431 is about 11467.4945389130. The cubic root of 131503431 is about 508.5250618758.

Adding to 131503431 its reverse (134305131), we get a palindrome (265808562).

The spelling of 131503431 in words is "one hundred thirty-one million, five hundred three thousand, four hundred thirty-one".