131425431 has 16 divisors (see below), whose sum is σ = 176773344. Its totient is φ = 86851584.

The previous prime is 131425403. The next prime is 131425439. The reversal of 131425431 is 134524131.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-131425431 is a prime.

It is a super-2 number, since 2×131425431² = 34545287827071522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131425439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287355 + ... + 287811.

It is an arithmetic number, because the mean of its divisors is an integer number (11048334).

Almost surely, 2^131425431 is an apocalyptic number.

131425431 is a deficient number, since it is larger than the sum of its proper divisors (45347913).

131425431 is a wasteful number, since it uses less digits than its factorization.

131425431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its digits is 1440, while the sum is 24.

The square root of 131425431 is about 11464.0931172073. The cubic root of 131425431 is about 508.4244997348.

Adding to 131425431 its reverse (134524131), we get a palindrome (265949562).

The spelling of 131425431 in words is "one hundred thirty-one million, four hundred twenty-five thousand, four hundred thirty-one".